We're back and a new "journey" has begun: amps and preamps - Page 70 - AVS Forum
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Old 05-31-2010, 05:12 AM
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Very nice. Polite but Authoritive sounding , and I love it. Don't forget I am using a tube pre also. 2 in mono are even better with the headroom it takes it to another level. I hear a Modwright 9.0 is a great match also with it. Lonewolf lent me the Butler's for a few months and I just fell in love. Next time he comes over I will ask to borrow his Modwright. Still looking for a good deal as my first one but nothing yet. I saw the one you grabbed but I nabbed mine off a local guy for about 6 bills less still with a year left on the warranty. I guess he was having financial trouble.
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Old 05-31-2010, 02:34 PM
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Congrats on the Amp, Nuance. Just a heads up on the Modwright 9.0... it is being phased out. Dan has a new pre getting ready for release... and even though it is supposed to be lower on the scale than a 36.5, I am thinking about "downgrading" to the new pre. A few major reasons for considering such a move are that the new one will have a headphone out, tube compliment is more in line with the Transporter, and I could get it in Black... On the other side of the coin, when the new model is released I am sure we will see several 9.0's hit the used market from people with upgradeitis... so if interested, keep your eyes open.

Cheers

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Old 06-02-2010, 11:48 AM
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Quote:
Originally Posted by evan1 View Post

Oh and a Black Sands Silver Ref MKIV power cable works well with it

I'm sure just about any power cord would, as well.

Bob Lee
Applications Engineer
QSC Audio Products, LLC
Costa Mesa, Calif.

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Old 06-12-2010, 11:57 AM - Thread Starter
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Is there a formula for determining amplifier gain?

My journey to find the "perfect" speaker
Dr. Olive's Blog

 

 

No matter what measurements tell us, a loudspeaker isn’t good until it
sounds good. - Dr. Floyd Toole
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Old 06-12-2010, 12:11 PM
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Old 06-12-2010, 03:35 PM - Thread Starter
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Quote:
Originally Posted by golfugh View Post

See here:

http://www.allaboutcircuits.com/vol_3/chpt_1/4.html

Problem?

No problem. I was just curious about what the Butler TDB 2250's gain is. So ah...is there an English conversion for that web page? That's too much thinking for me to do right now.

Oh, I'll reply to your PM later this weekend; been putting in a lot of listening time since yesterday.

My journey to find the "perfect" speaker
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No matter what measurements tell us, a loudspeaker isn’t good until it
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Old 06-12-2010, 07:17 PM
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Glad there's no problem! Call Butler on Monday, I bet they can tell ya! I'd also register the amp with them.

Mark
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Old 06-12-2010, 11:12 PM - Thread Starter
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Quote:
Originally Posted by golfugh View Post

Glad there's no problem! Call Butler on Monday, I bet they can tell ya! I'd also register the amp with them.

Mark

Will do. Thanks!

My journey to find the "perfect" speaker
Dr. Olive's Blog

 

 

No matter what measurements tell us, a loudspeaker isn’t good until it
sounds good. - Dr. Floyd Toole
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Old 06-12-2010, 11:12 PM - Thread Starter
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I plan on putting a lot more time in with the new addition to my audio system, but here are some initial impressions.

I took delivery of the Butler TDB 2250 amplifier this past Monday, but until this weekend I had only put about an hours listening time in with it. I have two young children and a pregnant wife, so things are very busy from the moment I go to work to the moment I hit the hay. This weekend, however, I put in a few more hours with the amplifier, and so far so good. The sound stage depth got dramatically better, not to mention the width and overall envelopment. While listening to albums like Keiko Matsui's "Sapphire" or Joe Satriani's "Professor Satchafunkilus and the Musterion of Rock," I could swear my rear speakers are on. I did get this effect with my old amp, but not to this extreme. Imaging is much more pinpoint/precise with the Butler...the sound is just so much more enveloping; I love it! Finally, the bass is quite different, with there being more heft and weight with the Butler. I don't know which is more accurate, but the Emotiva sounds thin and lean in comparison. I prefer the Butler, whether its more true to the source or not.

The only odd thing about the Butler is it ran 2.5 dB quieter than the Emotiva. Due to this I had to reduce the gain on my subwoofer amps and receiver's subwoofer output to compensate, else the bass was a bit overpowering below the crossover. I am guessing the difference in input sensitivity and impedance is what caused this. Either way, once I realized it and re-adjusted it was no longer an issue and was easier to compare apples to apples. Even after the reductions the bass control is still better using the Butler, so I don't understand why some people say its too lean. I found it to be the opposite.

I will continue to listen, but the more I do, the more I like this amp!

My journey to find the "perfect" speaker
Dr. Olive's Blog

 

 

No matter what measurements tell us, a loudspeaker isn’t good until it
sounds good. - Dr. Floyd Toole
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Old 06-15-2010, 03:39 PM
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Quote:
Originally Posted by Nuance View Post

Is there a formula for determining amplifier gain?

Gain = Vout/Vin

So if 1 volt in gives you 20 volts out, the gain is 20×.

dB = 20 * log(Gain)

So if the voltage gain is 20, it could also be expressed as 26 dB.

Bob Lee
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QSC Audio Products, LLC
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