My name is Shane, I'm new to this forum and I'm calling in from Australia.
I'm looking for a speaker that I can run with my DIY 300B amplifiers (01A/71A/300B, DC coupled with Monolith Magnetics OPT), 8W A1.
I'm coming from a pair of Duntech MTM's Vifa P13s and SEAS T25CF, sealed compartments within a sealed box, 5uF cross to phase inverted tweeter, P13's run parallel with small value of series resistance. Uses Jensen PIO cap and mills resistors. Time aligned sound good, bought them new in 1996, run them with a sealed servo sub looking for something new. Image attached.
Front end is pretty good FIFO based DIY DAC based upon PCM fed TDA1541A with Pulsar Clock and passive IV to D3a voltage amplifier, 2:1 80% nickel core OPT and hybrid CCS fed 12B4/LM431 shunt regulator. Attenuation via S&B TX-102 mk3 wired as AVC.
I've been listening to LM555 compression driver in front loaded horn (Azura), and the same again with Lowther PM2A.. and the question has always been 'what to do for LF'. From what I read, the OB 12" servo system is probably as good or better than anything out there, its cost effective, and flexible. I have heard Lowther Dx3 in OB and I'm not sure it gave up much to the FLH system, it did 'something' really right, and I'm leaning toward something from GR Research, they're obviously designed to work with the OB sub kits, I like the design philosophy, and from Dannys vids, I can see that he knows what he's doing. I see that Jay has experience with Spatial offerings (another option), and uses the GR speakers as reference, so I'm happy to read between the lines on that one. Other speakers I've considered are the Klipsch Cornwall 4's, and the 12" Tannoy from their Legacy Series.
Being from Oz, postage is expensive, and the AUD is down ~15% over the last 18 months. Not prohibitive, but time to be pragmatic for sure. And this leads to my question, the dual double 12" OB is a given, does the NX-Otica MTM give much up to the full NX-Otica?. Seems to me there would be omission of a large series cap with the MTM kit, overall settling time would be slower, efficiency might not be quite up to what 8W is happy with.. and I could be wrong about all of this. Looking for some suggestion on this, and perhaps some comment on subjective performance in, and around, and also WRT to the speakers I've mentioned above for comparison. Being where I am, audition is most likely not an option: unless there is someone in Australia with a pair?.
Thanks and kind regards,