Recent content by W9TR

GIK and others make combined absorber/diffuser panels that are one piece and easy to mount. I think treating the TV is a good first step. Looking at the room as a whole entity is a better approach. It’s easy to over absorb HF frequencies, under absorb bass, and not have enough diffusion. I...

A combination of absorption and diffusion is just the ticket for treating highly reflective flat panel TV’s.

These are the good old days in audio. So many excellent choices out there. I was surprised that my Purify Class D amp would sound the same as my McIntosh MC 602. But it did. I haven’t dipped my toe in SET waters as my speakers are too inefficient. But that may change, who knows? It’s all good fun.

Power amplifiers have gotten so good that differences in specific units are more significant than differences in their topology & class.

That’s a smart approach. I’m doing a 2 ch / theater combo and there are some compromises you have to make on both fronts to make it work, not the least of which is the room’s acoustics. Enjoy!

When Dr. Milind N. Kunchur published an AES Paper describing the physical properties leading to differences in cable audibility, the denizens of ASR were up in arms. They claimed the AES review board was incompetent (the AES review board are some of the best audio engineers on the planet) and...

I had my spatial accuracy tested at the Audio Localization Facility (ALF) at Wright Patterson Air Force Base. I have a spatial resolution of about 2 degrees ‘head on’ which corresponds to an inter-aural time difference of about 18 microseconds. If you use the classic f=1/t relationship that...

I’m an engineer by training and a music lover. I may even be an audiophile, although I hesitate, as that term has become pejorative. If you listened to FM radio in the 80’s and 90’s, before IBOC, there are better than even odds that you were listening through products I designed, especially...

IMO you already have the upgrade. The JAN Philips 6189W variant, (also 12AU7WA) has better linearity and lower noise than most other 12AU7’s regardless of manufacturer or vintage. They are not crazy expensive and are readily available in OEM boxes. For new tubes certainly try the Russian made...

I’ve found JA’s speaker reviews in Stereophile very helpful. I wish them all the best. I like their writing overall. It’s generally entertaining.

Mark Schifter is a crook. His AV123 business went belly up leaving scores of customers in the lurch. Here in Colorado, he ran a charity scam and got caught. He was convicted, served time, and is now out on parole. Don’t be an enabler. Stay far,far away.

I think it’s more interesting to describe how streaming changed your personal listening experience and system hardware and software. For me personally streaming is just another audio source. I built a computer music ecosystem in the early 2000’s, mostly to enable an iPod-based portable music...

I’ve had exceptional luck buying and selling. Until my last transaction, the sale of an expensive subwoofer. I received payment ex shipping from the buyer. In the process of working with the buyer to arrange shipping, he went dark on me. No contact. I have the sub, I have the buyer’s money...

Yep, you are correct. Even though the box is sealed to the outside (no ports) it is technically not a second order ‘Sealed’ enclosure. It is a 4th order box.

Really? What leads you to that conclusion?