Audio Research REF 6 Preamp

**Mike** · October 16, 2015, 11:01 AM

Reference 6: The Next Level of High Definition®

Almost since the inception of the brand, Audio Research has produced some of the finest components for music reproduction; this is especially true with regard to preamplifiers. In 1973, the SP3 was hailed as the best preamplifier available, and this tradition of excellence has continued ever since. The Reference Series from Audio Research was first introduced in 1995 and has been the ultimate representation of performance, musicality and power. The Reference 6 is the latest chapter of our story.

The Reference 6 is not simply a market-driven product, but rather, a solution to a need which arose after the creation of the Reference SE Series amplifiers. According to Warren Gehl, who is responsible for sonic development of all Audio Research products, the new series of Reference amplifiers offer a level of musical and dynamic capability only made apparent when using the flagship, two-chassis Reference 10 preamplifier. Both preamplifiers of the Reference Series need the ability to provide the full benefit of this new sonic landscape. Increasing the tube count to six in the analog section, and advancements in the power supply improved both macro- and microdynamics and lowered distortion. The Reference 6 also offers better bass control, relaxed purity and more dimensionality. Further improvements include a more grainless presentation, greater transparency, better speed, and more continuity across the musical spectrum. Quite simply, the Reference 6 improves upon its predecessor in every way for a more palpable and immediate musical performance.

Numerous elements – transformers, capacitors, wiring – are designs exclusive to Audio Research and the Reference 6. A completely new chassis has allowed not only a more beautiful aesthetic, but also provides more structural rigidity to assist in the dissipation of electrical and mechanical interferences. Six premium 6H30 tubes are now used in the audio circuit (increased from four tubes in the Reference 5SE) to provide an even quieter background and increased dynamic range. The tube-regulated power supply is also a new design for improved sonics. New circuit boards, circuit designs, and larger power transformer have been implemented to provide robustness and serviceability. A new volume control with finer step gradation and higher performance completes the system.

The Reference 6 will prove to be an eye-opener, both sonically and visually. The first units, available in natural anodized aluminum with acrylic cover, begin shipping in November. Experience the next level of High Definition®.

**cmalak** · October 16, 2015, 12:33 PM

Just saw the e-mail in my in-box. Don't like that they adopted the new GS styling in the Reference series.

**joeinid** · October 16, 2015, 03:59 PM

Originally Posted by cmalak

Just saw the e-mail in my in-box. Don't like that they adopted the new GS styling in the Reference series.

Ref 6 and GS150 could be a KILLER combo!

It's a good thing I'm not in the market for anything

**Frank750** · October 16, 2015, 04:00 PM

Originally Posted by cmalak

Just saw the e-mail in my in-box. Don't like that they adopted the new GS styling in the Reference series.

I agree with you, don't like the look.

**XV-1** · October 16, 2015, 05:40 PM

I know which look I prefer

**Bifwynne** · October 16, 2015, 07:04 PM

Originally Posted by joeinid

Ref 6 and GS150 could be a KILLER combo!

It's a good thing I'm not in the market for anything

An A'gon buddy just sent me an e-mail with the same advance release announcement and pic that Mike posted above. I surmise that the Ref 6 may be a very different piece of kit than the Ref 5 SE. The ARC announcement, kindly provided by Mike, states that the Ref 6 has six (6) 6H30 audio tubes. I can only infer the circuit has been materially changed as well.

Guess we'll have to wait for reviews and user comments.

Bruce

**joeinid** · October 16, 2015, 07:06 PM

Bruce,

I think this could be a really nice preamp.

**the professor** · October 16, 2015, 08:18 PM

from the pics, it looks like it will match the GS series

**Bifwynne** · October 16, 2015, 08:30 PM

Originally Posted by joeinid

Bruce,

I think this could be a really nice preamp.

I bet you are right. This is not a just a "super-sooped" up Ref 3.

I just checked a pic of the Ref 10 on the ARCDB web site. Interestingly, the Ref 10 is essentially a dual mono design. But each side used only 4 audio tubes (6H30) in the gain circuit ... 2 audio tubes each side (probably 2 gain stages). I wonder what the Ref 6 will sound like with 6 tubes (6H30) in the gain stage. It might represent another gain stage (maybe 3 gain stages) ... not sure. Maybe a techie will chime in.

ARC's announcement, which Mike was kind enough to post, mentions that there are "advancements in the power supply." Can't even imagine what that could be .. more caps??? I'd like to see a pic of the innards.

Let's stay on top of this. Could be interesting.

BIF

**Bifwynne** · October 16, 2015, 08:35 PM

Originally Posted by the professor

from the pics, it looks like it will match the GS series

Actually, when more information is released, I think you may be surprised. Yes ... it looks like a GS type amp on the outside. But based on reviews I have read about the GS Pre, it was pretty much a prettied-up Ref 5 SE, with a PH-8 phono pre shoved into one chassis. I am guessing the Ref 6 could be more ... much more. We'll have to wait until more information is released.

BIF

**joeinid** · October 16, 2015, 09:44 PM

The new McIntosh C110T has 3 tubes per channel for a total of 12 tubes (phono and line stage).

Originally Posted by Bifwynne

I bet you are right. This is not a just a "super-sooped" up Ref 3.

I just checked a pic of the Ref 10 on the ARCDB web site. Interestingly, the Ref 10 is essentially a dual mono design. But each side used only 4 audio tubes (6H30) in the gain circuit ... 2 audio tubes each side (probably 2 gain stages). I wonder what the Ref 6 will sound like with 6 tubes (6H30) in the gain stage. It might represent another gain stage (maybe 3 gain stages) ... not sure. Maybe a techie will chime in.

ARC's announcement, which Mike was kind enough to post, mentions that there are "advancements in the power supply." Can't even imagine what that could be .. more caps??? I'd like to see a pic of the innards.

Let's stay on top of this. Could be interesting.

BIF

**highEndguy** · October 16, 2015, 09:56 PM

My is on order
The countdown begins

**joeinid** · October 16, 2015, 09:58 PM

Originally Posted by highEndguy

My is on order
The countdown begins

Can't wait for your thoughts. This could be the one

**bzr** · October 17, 2015, 03:37 AM

"Joe", you aren't in what market?

"Nelson", you're so terrible!!! Look forward to your thoughts...

**Ritmo** · October 17, 2015, 07:33 AM

I tried posting a picture with an interior view of the Ref 6. It shows the 6 tubes as well as golden caps. Looks very attractive.

**mep** · October 17, 2015, 09:28 AM

Originally Posted by highEndguy

My is on order
The countdown begins

MSRP?

**XV-1** · October 17, 2015, 09:44 AM

Originally Posted by mep

MSRP?

14K

**joeinid** · October 17, 2015, 09:47 AM

Originally Posted by XV-1

14K

Maybe I'm in the market? Hmmmm.

**mep** · October 17, 2015, 10:54 AM

Originally Posted by XV-1

14K

That's only a $1k increase over the price of the Ref 5SE.

**highEndguy** · October 17, 2015, 10:57 AM

Now the GS150 can look in sync with the REF6

Sent from my iPhone using Tapatalk

**joeinid** · October 17, 2015, 11:01 AM

Originally Posted by mep

That's only a $1k increase over the price of the Ref 5SE.

So, any thoughts Mark? Worth considering the REF6?

**joeinid** · October 17, 2015, 11:01 AM

Originally Posted by highEndguy

Now the GS150 can look in sync with the REF6

**mep** · October 17, 2015, 11:44 AM

Originally Posted by joeinid

So, any thoughts Mark? Worth considering the REF6?

Joe-I honestly have no idea. I just checked ARC's website and they are still showing the Ref 5SE and not the Ref 6. I would imagine that ARC is going to drop the Ref 5SE if the Ref 6 is supposed to be better and the price is oh so close. If the Ref 6 is truly better than the Ref 5SE, hats off to ARC for introducing a newer and better preamp at a very moderate price increase.

**Mike** · October 17, 2015, 11:47 AM

$14k MSRP

Sent from my iPhone using Tapatalk

**ctop** · October 17, 2015, 11:58 AM

Originally Posted by mep

I would imagine that ARC is going to drop the Ref 5SE if the Ref 6 is supposed to be better and the price is oh so close. If the Ref 6 is truly better than the Ref 5SE, hats off to ARC for introducing a newer and better preamp at a very moderate price increase.

+1
Im sure a lot of Ref 5se owners like me would be watching this thread closely

**mep** · October 17, 2015, 12:44 PM

Originally Posted by ctop

+1
Im sure a lot of Ref 5se owners like me would be watching this thread closely

One thing I would like to know is if the power supply in the Ref 6 still uses a 6550 tube.

**mep** · October 17, 2015, 12:50 PM

Originally Posted by ctop

+1
Im sure a lot of Ref 5se owners like me would be watching this thread closely

One thing I would like to know is if the power supply in the Ref 6 still uses a 6550 tube. Stop the press: I just answered my own question when i did a net search. It uses a 6550 and a 6h30 in the power supply. The power transformer is supposed to be bigger and the Ref 6 weighs 6 lbs more than the Ref 5SE. ARC is saying the Ref 6 is a big improvement over the Ref 5SE. I will be most interested to say the least.

**cmalak** · October 17, 2015, 12:55 PM

Here are nudie pics from Mono and Stereo from our friend Wizard"

The Reference Series from Audio Research was introduced in 1995 and has been the ultimate representation of performance, musicality and power. Beginning with the Reference 1, the Reference 6 now continues the tradition of using the most re ned circuit designs in concert with the highest quality parts and components. Numerous elements – transformers, capacitors, wiring – are designs exclusive to Audio Research and the Reference 6. A completely new chassis has allowed not only a more beautiful aesthetic, but also provides more structural rigidity to assist in the dissipation of electrical and mechanical interferences. Six premium 6H30 tubes are now used in the audio circuit (increased from four tubes in the Reference 5SE) to provide an even quieter background and increased dynamic range. The tube-regulated power supply is also a new design for improved sonics. New circuit boards, circuit designs, and larger power transformer have been implemented to provide robustness and serviceability. A new volume control with ner step gradation and higher performance completes the system.

The Reference 6 is not simply a market-driven product, but rather, a solution to a need which arose after the creation of the Reference SE Series amplifiers. According to Warren Gehl, who is responsible for sonic development of all Audio Research products, the new series of Reference amplifiers o er a level of musical and dynamic capability only made apparent when using the flagship, two-chassis Reference 10 preamplifier. Both preamplifiers of the Reference Series need the ability to provide the full bene t of this new sonic landscape. Increasing the tube count to six in the analog section, and advancements in the power supply improved both macro- and microdynamics and lowered distortion. The Reference 6 also have better bass control, relaxed purity and more dimensionality. Further improvements include a more grainless presentation, greater transparency, better speed, and more continuity across the musical spectrum. Quite simply, the Reference 6 improves upon its predecessor in every way for a more palpable and immediate musical performance.

The Reference 6 line stage preamplifier is housed in a single chassis paneled in custom-machined aluminum. The vacuum tube audio stage utilizes six 6H30 vacuum tubes (three per channel), and one 6H30 and a 6550WE provide regulation in the power supply. The large, vacuum fluorescent display on the front panel shows all functions and volume. Two rotary encoders provide input selection and volume control, and a row of ve buttons control power, mute, invert, mono and menu controls. Menu functions include: input labeling, display brightness, processor input setup and tube hour reset. Four balanced and four single-ended inputs provide system connectivity. There are two main outputs providing both balanced and single-ended, as well as a record out. RS-232, IR input, and 12V trigger allow for additional control options. The Reference 6 ships with a full-function metal remote.

Frequency Response: +0-3dB, 0.5Hz to 200kHz at rated output (Balanced, 200k ohms load).
Distortion: Less than .01% at 2V RMS BAL output.
Gain: Main output: 12dB Balanced output, 6dB SE output.
Record out: 0dB (Processor input: 0dB SE output).
Input Impedance: 120K ohms Balanced, 60K ohms SE. Inputs 4 balanced, 4 single-ended. Assignable processor passthrough.
Output Impedance: 600 ohms Balanced, 300 ohms SE Main (2). 20K ohms minimum load and 2000pF maximum capacitance. Outputs (3): 2 main, 1 record out (XLR and RCA connectors).
Output Polarity: Non-inverting.
Maximum Input: 20V RMS BAL, 10V RMS SE.
Rated Outputs: 2V RMS (1V RMS SE) into 200K ohm bal- anced load (maximum balanced output capability is 30V RMS at less than 0.5% THD at 1kHz).
Crosstalk: -80dB or better at 1kHz and 10 kHz.

Controls:
Rotary encoders: Volume (103 steps), Select Input.
Push Buttons: Power, Proc, Menu, Enter, Mono, Invert, Mute.

Power Supplies: Electronically regulated low and high voltage supplies. Automatic 45 sec. warm-up/brown-out mute. Line regulation better than .01%.
Noise: 1.7uV RMS residual IHF weighted balanced equiv- alent input noise with volume at 1 (109dB below 2V RMS output.)
Tube Complement: (6)-6H30P dual triodes, plus (1 each) 6550C and 6H30P in power supply.
Power Requirements: 100-135VAC 60Hz (200-270VAC 50/60Hz) 130 watts. Standby: 2 watts.

Dimensions:
Width Height Depth: 19” (48 cm) 7.8” (19.8 cm) 16.5” (41.9 cm)
Handles extend 1.6” (4 cm) forward of the front panel. Weight: 36.5 lbs. (16.6 kg) Net; 53 lbs. (24 kg) Shipping.

World Première: Festival SON et IMAGE Paris October 17-18, 2015
Availability: Shipping begins November 2015
Finishes: Available in natural anodized aluminum with clear acrylic cover
Price: $14,000 US

**Dpod4** · October 17, 2015, 01:06 PM

I have someone who wants to buy my air tight ate 2001 preamp. I had sold my ref 5se since it didn't sound as good in my system as the air tight. If I could get the arc ref 6 at a discount I would sell my friend the air tight since any marginal difference would be made up due to convenience of one box and balanced inputs and outputs. Anyone here an ARC dealer or have connections ? Darrin

**cmalak** · October 17, 2015, 01:44 PM

Nelson (HighEndGuy) is an ARC dealer based out of the Dominican Republic I believe.

**ctop** · October 17, 2015, 02:00 PM

Not surprisingly, four ref 5se units already for sale at Audiogon since yesterday...

**Dpod4** · October 17, 2015, 02:14 PM

If I could find a ref 6 for 11.5k I would get it.

**PureVinyl** · October 17, 2015, 03:49 PM

Had a chance to hear the AR GSpre and GS150 amp paired with the Focal Sopra 2 (great looking speaker-Amazing build quality)

IMO: did not make a great combo, with the KT150's i thought it sounded a little harsh and kinda light on the dynamics.

But when paired with PASS XA100.5 mono's it sounded great!

was hoping for a better showing of the new GS series

Cheers

**PureVinyl** · October 17, 2015, 03:57 PM

Originally Posted by Dpod4

If I could find a ref 6 for 11.5k I would get it.

i would be looking at a VAC pre or even a CAT Renaissance either one could fit the bill.

have fun with your search.......

**Bifwynne** · October 17, 2015, 04:10 PM

Originally Posted by PureVinyl

Had a chance to hear the AR GSpre and GS150 amp paired with the Focal Sopra 2 (great looking speaker-Amazing build quality)

IMO: did not make a great combo, with the KT150's i thought it sounded a little harsh and kinda light on the dynamics.

But when paired with PASS XA100.5 mono's it sounded great!

was hoping for a better showing of the new GS series

Cheers

Perhaps the GS150 was simply not a good electrical match with the Focals. Even though the output impedance of the GS150 is "low'ish," even off the 4 ohm taps it runs between .55 and .87 ohm). Even higher off the 8 ohm taps. See Atkinson bench measurements: http://www.stereophile.com/content/a...zdOYUIGP5MC.97 (Note: the GS150, Ref 150 and Ref 150 SE have almost identical electrical specs).

By contrast, I surmise that the Pass's output impedance is more typical of a normative SS "Voltage Paradigm" amp ... that is, very, very low. A possible result could be that if the Focals have a prominent impedance peak at the mod/tweeter point, the SPL output in that FR spectrum might be a little augmented ... resulting in a sense of harshness. Even more so if the 8 ohm taps are used. All guesses of course.

Of course, I assume that all of the gear that was auditioned was well broken-in.

Thanks for your opinions. Always helpful.

BIF

**Mike** · October 17, 2015, 04:13 PM

I can confirm that Pass Class A with Focal is a GREAT match. Then again, I haven't found anything that isn't a great match with my Pass amps - yet.

I would love to hear the REF6 with the GS150's. I bet on SF speakers that would be magic.

Sent from my iPhone using Tapatalk

**joeinid** · October 17, 2015, 04:39 PM

Originally Posted by Mike

I can confirm that Pass Class A with Focal is a GREAT match. Then again, I haven't found anything that isn't a great match with my Pass amps - yet.

I would love to hear the REF6 with the GS150's. I bet on SF speakers that would be magic.

Sent from my iPhone using Tapatalk

Are you talking to me?

**highEndguy** · October 17, 2015, 05:36 PM

I think someone is in trouble

Sent from my iPhone using Tapatalk

**joeinid** · October 17, 2015, 05:39 PM

Originally Posted by highEndguy

I think someone is in trouble

**mep** · October 17, 2015, 07:43 PM

The Ref 6 could be a real contender. I'm more interested by the minute.

**Mike** · October 17, 2015, 07:52 PM

I bet it's amazing.

I have to say, I think the GS150 is one of the greatest amps I've ever heard. One of those amps that comes along once every 10 years or so. One of those amps that is so good, even the designers can't believe how good it turned out.

ARC is really on a roll lately. Good on them. Every piece of ARC gear I've ever owned, has been world class - regardless of price.

Sent from my iPhone using Tapatalk

**highEndguy** · October 17, 2015, 10:30 PM

And there's also a new DAC coming

Sent from my iPhone using Tapatalk

**Mike** · October 17, 2015, 10:34 PM

Originally Posted by highEndguy

And there's also a new DAC coming

Sent from my iPhone using Tapatalk

THAT is what I'm waiting to see and hear.

Sent from my iPhone using Tapatalk

**MRJAZZ** · October 17, 2015, 10:38 PM

Originally Posted by Mike

I bet it's amazing.

I have to say, I think the GS150 is one of the greatest amps I've ever heard. One of those amps that comes along once every 10 years or so. One of those amps that is so good, even the designers can't believe how good it turned out.

ARC is really on a roll lately. Good on them. Every piece of ARC gear I've ever owned, has been world class - regardless of price.

Sent from my iPhone using Tapatalk

I concur. THE GS 150 is the best amp we have used in our primary demo room. We will be partnering it with the REF 6 pre in the near future.
CHEERS...........

**Ritmo** · October 17, 2015, 10:51 PM

Originally Posted by Mike

I bet it's amazing.

I have to say, I think the GS150 is one of the greatest amps I've ever heard. One of those amps that comes along once every 10 years or so. One of those amps that is so good, even the designers can't believe how good it turned out.

ARC is really on a roll lately. Good on them. Every piece of ARC gear I've ever owned, has been world class - regardless of price.

Sent from my iPhone using Tapatalk

Mike -

I agree with you. I heard the GS150 with the ARC Ref 10 and Wilson XLFs - the system sounded fantastic. While the XLFs are very efficient, the GS150 rocked! Transparent, dynamic with "cojones" on the bottom end. And, it looks terrific!

My sense is that the Ref 6 and the GS150 will be a killer combo.

**La Dolce Vita** · October 18, 2015, 10:36 AM

Originally Posted by highEndguy

I think someone is in trouble

Sent from my iPhone using Tapatalk

Correction Nelson...SOMEONES!!! ;-)

Sent from my iPhone using Tapatalk

**highEndguy** · October 18, 2015, 10:43 AM

Ha !!!
I have like 5 clients wanted me to trade in they're 5se
Too many ,ahhahahaha

**La Dolce Vita** · October 18, 2015, 10:46 AM

;-) lol no doubt! My representative will be in touch with you shortly.

Sent from my iPhone using Tapatalk

**joeinid** · October 18, 2015, 10:53 AM

No soup for you

Originally Posted by La Dolce Vita

;-) lol no doubt! My representative will be in touch with you shortly.

Sent from my iPhone using Tapatalk

**La Dolce Vita** · October 18, 2015, 10:55 AM

Lol!! Uh, your not my rep. Anyway I say soup for all the NY crew!

Sent from my iPhone using Tapatalk

Thread: Audio Research REF 6 Preamp