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Old 25th November 2021, 04:50 PM   #21
nigelwright7557 is offline nigelwright7557  United Kingdom
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Location: Carlisle, England
Originally Posted by HeyBill View Post
+1 for rayma. Building your own probably keeps the brain running better, not to mention the hand eye coordination. WAF aside. Happy Thanksgiving, HeyBill
Walking blindly into audio can work either way.
I decided to build a mobile disco in 1980.
Looked around at amplifiers and after looking at module amps decided to go for a discrete Maplin 225WRMS amplifier.
I then simply bought four Fane 12-50WRMS speakers and popped them into boxes with no though about size except they should fit in the car,

I was lucky it turned out ok. Never had any complaints about the sound despite speakers only working up to 3KHz. Only sound complaint was turn it down a bit.

My costs for the project were minimal compared to the thousands some people pay for systems.
PCBCAD software https://www.murtonpikesystems.co.uk Model railway electronics http://platformfour.uk//
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Old Yesterday, 03:11 AM   #22
jjasniew is offline jjasniew  United States
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Join Date: Feb 2002
Location: Olympia, WA
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Originally Posted by Markw4 View Post
One particular shortcoming of the Benchmark AHB2 was that a few small details of sound seemed to be overly attenuated or else missing.
I have to wonder if this observance brings into question the assertion that amplifier distortion - or distortion profile - effects perceived dynamics of material played through.

The lower distortion amp loses out because the ding of that triangle sounds a bit less like it's actually in the room. It - apparently - doesnt have as crisp a presentation, or seems overly attenuated when doing an amp comparison.

Of course, like explicit dynamic range expansion, there's only so far you can go with using distortion (profiles) to effect that perception.

Since those types of sounds are "missing" for me these days - I'll take all the dynamic range I can fake - before it all turns into mud of course. (If the triangle were actually being played in the room, I'm pretty sure I'd still hear it, even with my eyes closed. So why no longer in the recording?)

So perhaps the salesman should say "You're how old? Have we got a distortion (profile) for you!" Or there's an integrated amp with Input, Bass, Treble, Age and Volume controls on the front panel... Age goes to from 10 - 100...
Joe Jasniewski - W10 PC>ZOUDIO AIO4CH> OB Lii Audio F15s w/ 18" assists. Daphile>XMOS I2S>ZOUDIO AIO4CH> OB Pluvia 7 HDs w/ 18" assists.

Last edited by jjasniew; Yesterday at 03:17 AM.
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Old Yesterday, 03:50 AM   #23
indra1 is offline indra1  Indonesia
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Location: Bogor
Don't worry, we still have phase shift vs frequency, amp to speaker interaction, thermal memory distortion, output impedance variation vs amplitude and frequency and perhaps some other delicious seasonings on the menu.
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Old Yesterday, 05:00 PM   #24
Markw4 is offline Markw4  United States
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Join Date: Jul 2016
Location: California
Originally Posted by jjasniew View Post
I have to wonder if this observance brings into question the assertion that amplifier distortion - or distortion profile - effects perceived dynamics of material played through.
Didn't sound like distortion. In fact measured AHB2 distortion it is one of the lowest of any amplifier made today. Thus distortion as an explanation seems less likely when prior probability is considered. Also as previously mentioned, sounded more like noise modulation to me (smooth, subtle sounding noise in this case).

As an aside, sometimes it feels like audio engineers tend to be overly focused on HD. We may look for it because we have very sensitive ways of measuring it, and if we don't find any then we may tend to jump to the conclusion there can be not be any problem unless it is an imaginary one. Sort of reminds me of the story about the drunk looking for his car keys under a streetlight, rather than looking in the dark alley where the keys were dropped. Silly story, and easy to see when someone else is making the mistake. Can be almost impossible to realize when one's self may be involved in doing an analogous type of thing though.
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