amps on front of bottlehead page

aragorn723 · 1785

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Offline aragorn723

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on: September 12, 2014, 04:12:31 PM
What kind of amps are those on the front page of the bottlehead website?

Dave



Offline Doc B.

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Reply #1 on: September 24, 2014, 09:19:43 AM
?

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.


Offline Grainger49

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Reply #2 on: September 24, 2014, 10:00:35 AM
Dave, you might give Dan a link so he knows what you are asking.



Offline denti alligator

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Reply #3 on: September 24, 2014, 12:08:46 PM
He probably means the room full of Paramounts.

- Sam

Rega P3-24 (w/AT 150MLX) w/Groovetracer upgrades / Eros II / FLAC >J.River >DSD256 >Gustard X20 / Moreplay > Stereomour II / Klipsch Forte II w/Crites upgrades / C4S S.E.X. 2.0 +Nickel MQ Iron / Speedball Crack / Sennheiser HD600 w/Cardas cable


Offline aragorn723

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Reply #4 on: September 24, 2014, 03:04:22 PM
that must be it, looks like they are  on ikea bookshelves.  Are those amps all hooked up?

Dave



Offline Paul Joppa

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Reply #5 on: September 24, 2014, 04:37:47 PM
All hooked up and running. One for each woofer (there are eight), four in a special arrangement driving each midrange (which is not very efficient but sounds really really good) and one on each ribbon tweeter. There's a fairly complex crossover upstream of the amps. Doc B has been trimming and tuning these for a long time - a decade maybe? Good speakers are a heck of a lot of work!

Paul Joppa


Offline mcandmar

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Reply #6 on: September 24, 2014, 04:56:05 PM
Out of curiosity what are the speakers?

M.McCandless


Offline Doc B.

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Reply #7 on: September 24, 2014, 06:18:54 PM
Actually we have trimmed back from that old photo and right now there is only one amp per two woofers, so only four bass amps. Don't want to get excessive with the amp count! The speakers are something we have cooked up over the past 7 years. I needed something that sounded comparable to the $60K-$180K speakers my partners use in their mastering rooms and I didn't have a spare $180K laying around so we have done it for somewhat less. Drivers are Raal ribbons, ATD Hypergraph midranges and Exodus Audio woofers. You can't get any of those but the Raals these days. The system is capable of roughly 105dB peaks and is pretty well around 35-20kHz +/- 3dB in room.

PJ is right that this system has been going thru an evolution for many years. If you look at the system in the video, that is pretty close to the current setup. You can see that the drivers have been rearranged and time aligned for the sweet spot. The room has had a lot of tuning done as well. That is a large part of the system equation, that most people overlook or compromise for various reasons.
« Last Edit: September 24, 2014, 06:31:05 PM by Doc B. »

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.