Results 1 to 14 of 14
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December 9, 2018, 05:32 PM #1
HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
Which would offer greatest transparency, assuming highest quality resistors?
Line level or speaker level?
My Tannoys are 8 ohm, and I need to drop their output 2 dB with minimal/no loss.
What value resistor(s) per application?
Thanks!DPT4ME - Dynamics, Presence & Tone for Musical Engagement; MBP (3) - stripped down for music only; Shunyata Omega & Sigma USBs; ISO REGEN w/short Curious USB links; Berkeley Alpha USB; Aqua La Scala II Optologic DAC; Schiit Yggdrasil - fully updated; Ayre Codex dac - updated; Pass Labs INT-60 integrated amp; Wyred 4 Sound STP-SE-2 preamp, Quicksilver Mono 120 amps w/Tung-Sol KT150s; Quicksilver Mid Mono amps w/Gold Lion KT77s; Fyne Audio 703s; Symposium Svelte Plus & Ultra Platforms; REL S-812 subwoofers; Duelund DCA12GA speaker cables; AV Room Service EVPs, Stein Music Harmonizers, Duelund DCA16GA & 20GA ICs; Shunyata Denali 6000S/V2; Tripp Lite PCs; Wyred 4 Sound power cords; AudioDharma cable cooker; dedicated custom room; various GIK & ASC room treatments; etc.
www.getbettersound.com
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December 9, 2018, 06:37 PM #2
- Join Date
- Feb 2016
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- west Michigan
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- 713
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
It is my understanding that it is more difficult to do and has more sonic penalties to do this speaker level than it does line level.
Rothwell makes some nice inline rca attenuators or
A search online for "Homemade RCA attenuator" on the Instructables web page provides all the details necessary to roll your own using your favorite resistors.My System
Acoustic Revive RTP-4
Innuos Pulsar
Lampizator BALTIC4
Cary SLP-05
Pass XA30.5 or
Line Magnetic 845ia
Reference 3A Reflector's
Pr SVS SB3000 Subs
Cables & Tubes "subject to change without notification".
Complete system on battery power/solar
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December 9, 2018, 08:59 PM #3
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
Jim - low level would be my choice. Why? Constant impedance vs frequency as compared to a speaker load which can have large magnitude variations. I can do the calculations for you if I know the output impedance of your preamp and the input impedance of your power amp.
TomTom
Audio:
Amati Futura Mains
Amati Homage VOX Center,
Proac Response 1sc Rears,
Three MC2301's for L,C,R
MC 602 for the rears
C 1100, MX 151, MCD 1100, MR 77
Nottingham Dais with Sumiko Palo Santos Presentation
SurfacePro 3, JRiver, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC
Video:
MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.
Lake House:
Ohm F, MC 275V, C2300, MR 80, Rega P3
OnDeck:
McIntosh MAC 4300v
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December 10, 2018, 10:24 AM #4
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
Tom,
Thanks!
I also thought low-level, but since the Tannoys are such a simple load, thought I might be wrong.
It's actually my DAC driving my integrated.
DAC output impedance - 75 ohms
Integrated input impedance - 10k ohms.
Do you have a preferred brand/type of resistor for maximum transparency?
I thought I would insert it into the positive lead on my interconnect from the DAC to the amp.
Or is there a better way without going into the units?
Best,
JimDPT4ME - Dynamics, Presence & Tone for Musical Engagement; MBP (3) - stripped down for music only; Shunyata Omega & Sigma USBs; ISO REGEN w/short Curious USB links; Berkeley Alpha USB; Aqua La Scala II Optologic DAC; Schiit Yggdrasil - fully updated; Ayre Codex dac - updated; Pass Labs INT-60 integrated amp; Wyred 4 Sound STP-SE-2 preamp, Quicksilver Mono 120 amps w/Tung-Sol KT150s; Quicksilver Mid Mono amps w/Gold Lion KT77s; Fyne Audio 703s; Symposium Svelte Plus & Ultra Platforms; REL S-812 subwoofers; Duelund DCA12GA speaker cables; AV Room Service EVPs, Stein Music Harmonizers, Duelund DCA16GA & 20GA ICs; Shunyata Denali 6000S/V2; Tripp Lite PCs; Wyred 4 Sound power cords; AudioDharma cable cooker; dedicated custom room; various GIK & ASC room treatments; etc.
www.getbettersound.com
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December 10, 2018, 10:25 AM #5
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
DPT4ME - Dynamics, Presence & Tone for Musical Engagement; MBP (3) - stripped down for music only; Shunyata Omega & Sigma USBs; ISO REGEN w/short Curious USB links; Berkeley Alpha USB; Aqua La Scala II Optologic DAC; Schiit Yggdrasil - fully updated; Ayre Codex dac - updated; Pass Labs INT-60 integrated amp; Wyred 4 Sound STP-SE-2 preamp, Quicksilver Mono 120 amps w/Tung-Sol KT150s; Quicksilver Mid Mono amps w/Gold Lion KT77s; Fyne Audio 703s; Symposium Svelte Plus & Ultra Platforms; REL S-812 subwoofers; Duelund DCA12GA speaker cables; AV Room Service EVPs, Stein Music Harmonizers, Duelund DCA16GA & 20GA ICs; Shunyata Denali 6000S/V2; Tripp Lite PCs; Wyred 4 Sound power cords; AudioDharma cable cooker; dedicated custom room; various GIK & ASC room treatments; etc.
www.getbettersound.com
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December 10, 2018, 12:55 PM #6
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
Line level is the better way to go than a ladder network at the speaker, which is 8ohms nominal, not constant. That said, why do you need to reduce the level by a constant 2db?
Harrison Labs makes in line attenuators (3db), but they may violate audiophile pricing laws at around $30/pr
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December 10, 2018, 01:46 PM #7
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
Hi AJ,
I had already ordered the -3dB Harrison units from Part Express.
My ASR Emitter 2 has an optimum volume setting where no relays, attenuators, gain circuits, etc. are employed.
Unfortunately that is about 2dB too loud for the majority of my playlists, especially for RoomPlay Reference sessions.
Probably due to my OCD , I wanted to see which was the least degradation - an inline attenuator, or simply choosing the best volume setting overall.DPT4ME - Dynamics, Presence & Tone for Musical Engagement; MBP (3) - stripped down for music only; Shunyata Omega & Sigma USBs; ISO REGEN w/short Curious USB links; Berkeley Alpha USB; Aqua La Scala II Optologic DAC; Schiit Yggdrasil - fully updated; Ayre Codex dac - updated; Pass Labs INT-60 integrated amp; Wyred 4 Sound STP-SE-2 preamp, Quicksilver Mono 120 amps w/Tung-Sol KT150s; Quicksilver Mid Mono amps w/Gold Lion KT77s; Fyne Audio 703s; Symposium Svelte Plus & Ultra Platforms; REL S-812 subwoofers; Duelund DCA12GA speaker cables; AV Room Service EVPs, Stein Music Harmonizers, Duelund DCA16GA & 20GA ICs; Shunyata Denali 6000S/V2; Tripp Lite PCs; Wyred 4 Sound power cords; AudioDharma cable cooker; dedicated custom room; various GIK & ASC room treatments; etc.
www.getbettersound.com
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December 10, 2018, 03:26 PM #8
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
Jim,
Is there any reason why this can't be done in software?
I'm sure this is going to be a learning moment for me but just had to ask.
Regards.2 Channel Stereo :
Custom Win10 Transport | Mutec MC-3+ USB | Lampizator Amber | Acoustic Portrait Thiyaga | ATC SCM20PSL + JL Audio E-Sub e110
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December 10, 2018, 03:56 PM #9
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
DPT4ME - Dynamics, Presence & Tone for Musical Engagement; MBP (3) - stripped down for music only; Shunyata Omega & Sigma USBs; ISO REGEN w/short Curious USB links; Berkeley Alpha USB; Aqua La Scala II Optologic DAC; Schiit Yggdrasil - fully updated; Ayre Codex dac - updated; Pass Labs INT-60 integrated amp; Wyred 4 Sound STP-SE-2 preamp, Quicksilver Mono 120 amps w/Tung-Sol KT150s; Quicksilver Mid Mono amps w/Gold Lion KT77s; Fyne Audio 703s; Symposium Svelte Plus & Ultra Platforms; REL S-812 subwoofers; Duelund DCA12GA speaker cables; AV Room Service EVPs, Stein Music Harmonizers, Duelund DCA16GA & 20GA ICs; Shunyata Denali 6000S/V2; Tripp Lite PCs; Wyred 4 Sound power cords; AudioDharma cable cooker; dedicated custom room; various GIK & ASC room treatments; etc.
www.getbettersound.com
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December 10, 2018, 05:42 PM #10
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
DUHH!!!
I researched the level adjustment of Audirvana from my computer, and it was stupidly easy to do!
Thanks Nikhil!!!DPT4ME - Dynamics, Presence & Tone for Musical Engagement; MBP (3) - stripped down for music only; Shunyata Omega & Sigma USBs; ISO REGEN w/short Curious USB links; Berkeley Alpha USB; Aqua La Scala II Optologic DAC; Schiit Yggdrasil - fully updated; Ayre Codex dac - updated; Pass Labs INT-60 integrated amp; Wyred 4 Sound STP-SE-2 preamp, Quicksilver Mono 120 amps w/Tung-Sol KT150s; Quicksilver Mid Mono amps w/Gold Lion KT77s; Fyne Audio 703s; Symposium Svelte Plus & Ultra Platforms; REL S-812 subwoofers; Duelund DCA12GA speaker cables; AV Room Service EVPs, Stein Music Harmonizers, Duelund DCA16GA & 20GA ICs; Shunyata Denali 6000S/V2; Tripp Lite PCs; Wyred 4 Sound power cords; AudioDharma cable cooker; dedicated custom room; various GIK & ASC room treatments; etc.
www.getbettersound.com
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December 11, 2018, 10:33 PM #11
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
So this is probably late but here are the calculations:
-2dB is a voltage ratio of 0.7943 x=10^(-2/20)
This is a simple resistive series divider. Rx=(1-.7943)*10000/.7943
rx= 2589 ohms. Subract the 75 output impedance of your DAC and you get 2514 ohms.
Closest 1% value is 2.49kOhms
Closest 0.1% value is 2.52kOhms
I like Vishay metal film resistors.
Calculating back, the 1% 2.49k resistor will result in an attenuation of 1.98 dB.
You would put this resistor in series with the center conductor of your single ended interconnect, preferably at the preamp input end so the cable capacitance would not have a deleterious effect on frequency response.
There is a caveat to this method. It assumes that the input impedance of your preamp is constant vs. frequency, and this is not always the case.
Enjoy!
TomTom
Audio:
Amati Futura Mains
Amati Homage VOX Center,
Proac Response 1sc Rears,
Three MC2301's for L,C,R
MC 602 for the rears
C 1100, MX 151, MCD 1100, MR 77
Nottingham Dais with Sumiko Palo Santos Presentation
SurfacePro 3, JRiver, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC
Video:
MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material.
Lake House:
Ohm F, MC 275V, C2300, MR 80, Rega P3
OnDeck:
McIntosh MAC 4300v
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December 12, 2018, 02:51 AM #12
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
I asked this exact question of Emmanuel Go with First Sound as my speaker change went from 89dB to 96db. The lowest volume setting is to loud. He wants to put the resistor on one of the input of my preamp.
First Sound Mark3SI preamp. Audion Black Shadow 845 SET Monoblocks. Mojo Audio Deja Vu Server. Mojo Audio Mystic 3 DAC. Linear Solution Ethernet Switch. Gigafoil with LPS. STST Motus II TT with Vertere SG1 arm, Hana ML Cartridge, Allnic H1201 phono pre. Pure Audio Project Trio 15 Horn speakers with Mundord Supreme oil caps. Power via 10 awg Oyaide cable from panel to custom distribution strip feeding front end. Oyaide dedicated10 AWG branch circuits from panel to each amp. Inakustik speaker and interconnect cables, Genesis Interconnect.
Kingrexelectric.com Lyncole certified grounding specialist.
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December 12, 2018, 02:56 AM #13
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- May 2013
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- Tallahassee, Florida/Greenville, SC
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- 3,242
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
Why don't you just lower the level somewhere in the steps of your streaming chain?
Main - JVC QL-Y7/Denon DL-301 Mk II, Gold Note PH-10, Jays CDT3 Mk3 , Auralic Aries G2.2, Holo May KTE, Supratek Cabernet, Kinki Studio EX-B7 monoblocks, Verity Audio Otello, (2) Rythmik F12SE, Audio Envy IC, SC & PC's, Triode Wire Lab PC's, Inakustik USB and I2S, (2) Puritan Audio Labs PSM-156 with Groundmaster City, Timbernation rack
Family Room - Oppo UDP-203, Auralic Aries, Aqua La Voce S3, Kinki Studio EX-M1+, Nola KO, (2) Rythmik F-12G, Wireworld SC & IC's, Neotech PC's, SurgeX SA-1810
Greenville, SC- Jays CDT2 Mk 3, Auralic Aries G1, Holo Spring 3 KTE, Supratek Chardonnay, Odyssey Audio Kismet Reference, Rosso Fiorentino Volterra 2, (2) RSL Speedwoofers, iFi Audio Power Station, Wireworld IC's, Inakustik USB and I2s, Triode Wire Lab SC, Triode Wire Lab PC's, Furutech NCF Clear Line, Timbernation rack.
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December 12, 2018, 07:03 AM #14
Re: HELP!!! How to drop 2 dB in volume with 8 ohm speaker - amp level or line level?
DPT4ME - Dynamics, Presence & Tone for Musical Engagement; MBP (3) - stripped down for music only; Shunyata Omega & Sigma USBs; ISO REGEN w/short Curious USB links; Berkeley Alpha USB; Aqua La Scala II Optologic DAC; Schiit Yggdrasil - fully updated; Ayre Codex dac - updated; Pass Labs INT-60 integrated amp; Wyred 4 Sound STP-SE-2 preamp, Quicksilver Mono 120 amps w/Tung-Sol KT150s; Quicksilver Mid Mono amps w/Gold Lion KT77s; Fyne Audio 703s; Symposium Svelte Plus & Ultra Platforms; REL S-812 subwoofers; Duelund DCA12GA speaker cables; AV Room Service EVPs, Stein Music Harmonizers, Duelund DCA16GA & 20GA ICs; Shunyata Denali 6000S/V2; Tripp Lite PCs; Wyred 4 Sound power cords; AudioDharma cable cooker; dedicated custom room; various GIK & ASC room treatments; etc.
www.getbettersound.com
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AudioShark forum is a leading forum site for High End Audio Discussion, Stereo System Discussion, Home Theater System Discussion, Best Home Stereo System Discussion, Home Theater Installation Discussion etc.
The AudioShark forum was created for sharing the passion of high-end Audio. We have Audiophiles from all over the world participating and sharing their knowledge. From novice to experts, you will find a friendly environment for discussing about High End Audio, Stereo System, Home Theater System, Home Stereo System, Home Theater Installation, Amplifiers, Speakers, Subwoofers, Integrated System, Acoustic treatments & Digital Room Corrections and many more.
At AudioShark, we also have incorporated an exciting Marketplace where members can peruse terrific buys on used gear, as well as meet dealers and discuss the purchase of new gear.
We are as crazy about this hobby as you are! So come on in and join us! Audioshark.org the Friendliest Audio Forum!
Industry Participation Disclosure : The owner and administrator of Audioshark is the owner of Suncoast Audio LLC in Sarasota Florida. Suncoast Audio has a full brick and mortar presence in Sarasota with several great show rooms with many world class brands. More information can be found at http://www.suncoastaudio.com
Audioshark is a community of like minded individuals. Audioshark welcomes participation from all manufacturers and owners of all brands and products. It is our belief that online forums provide a community of like minded audiophiles and music lovers to encourage the growth of this wonderful hobby.
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