Recent content by etc6849

Welcome to the forum! They are Lundahl LL9202 transformers. All sine wave measurements posted are of the transformer setup. Of course, the BHSE can do 1500Vpp at 10Hz with a beautiful looking sine wave. Getting ~1400Vpp @10Hz from a transformer setup with a clean looking waveform is really...

Thanks to @Aokman for his inspiration and advice, along with @kevin gilmore for answering questions. This setup sounds fantastic. Easily puts out over 2kV down to ~13Hz with a perfect looking sine wave. 10Hz will go up to ~1400Vpp before starting to distort a little. I stopped my testing a...

Not slimy at all IMHO. Any technician or engineer understands rms vs peak to peak vs peak, and it clearly states peak to peak and not RMS. The designer also posts the circuit and many other details here...

The highest the L+ wave can be wrt ground is limited to A = 400V (actually it's a little less than that). Now, since L- (dashed waveform I drew) is the inversion of L+, the max difference between the two sine waves would be 2A or +800V (when L+ is above L-). When L- gets above L+, that means...

I'm pretty sure they're all like that due to math :D But yeah, it confused me for a bit before I drew out the waveform... If you measure L+ or L- wrt audio ground: If you measure between L+ and L- with a differential probe:

Kevin Gilmore is right about these designs with small transformers. My BHSE has the same output at 20Hz as it does at 10Hz and over 20kHz (with no clipping up to its rating of over 1500V peak to peak)... imagine that: a product that actually lives up to its specs. Thanks for measuring this...

Thanks again! These are all great points and information to consider. I will have to give some of these software options a try and test them out.

Hi Keith, thanks for the reply. JRiver has a virtual sound card included, but I'm not sure how stable it is and haven't used it. One problem with JRiver I have is it hangs up sometimes when I try to close it. My theater has an older version of the software though, but I can't imagine relying...

What I'd like to explore doing is to move my 5.1 system (5 actively tri-amped speakers and 5 subs) to a Windows 10 software based solution that uses normal DACs attached to an RME HDSPe AES sound card (16 channels out). I would need to add a second HDSPe AES card, but RME's software should...

What I'd like to explore doing is to move my 5.1 system (5 actively tri-amped speakers and 5 subs) to a Windows 10 software based solution that uses normal DACs attached to an RME HDSPe AES sound card (16 channels out). I would need to add a second HDSPe AES card, but RME's software should...

Wow, there are a ton of options now! This thread is great. Back when I tri-amped my system and added multiple subs there wasn't a lot of discussion on this topic. What I'd like to explore doing is to move my 5.1 system (5 actively tri-amped speakers and 5 subs) to a Windows 10 software based...

When I built the system, there weren't cheaper ultra low noise amplifiers available. The Benchmark AHB2's were the only amps that didn't have an audible hiss with my horns, especially once I removed the passive crossovers. I wouldn't want a volume control on something I use for an active...

I don't use passive crossovers at all as I was only interested in the best possible performance. I use active FIR filters for H, M and L, and a low order bessel filter for crossing to the 5 subs. Of course all 20 amp channels are time aligned as well. 90dB is at the main listening position...

The room dominates a lot too, especially for a normal sized (e.g. small) room. Here are some measurements of my setup at the main listening position. No EQ used either, but it is a customer tri-amped setup crossed to 5 powered subs (so really quad amped).

I wish the review would compare AHB2 in bridged mode and in low gain mode versus the LA90 in bridged mode and low gain mode. It seems pretty unfair to compare the LA90 in low gain mode and to the Benchmark AHB2 in high gain mode regardless of the stereo mode and mono mode setting... Amir...