Hi,
Quote:
Originally posted by kwkarth
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I for one, would also love to know if Creek have any plans for an even "higher end" head amp if you could share such a thing.
Thanks and Cheers! |
Thanks for warm welcome. We always looking for ways to improve our products, but at the moment there is no plans to develop a new separate headphone amplifier. There could be a cosmetics change for OBH series in a near future and possible middle-life update for OBH-11 "standard" version - it is getting a bit long in tooth as it was one of the very first headphone amps on the market when it was produced in 1995.
Here the short measurements results summary for OBH-11SE rev "A" and "B". Note: all measurements but (5) referenced to 1mW output into 100 Ohm load = 0.316 V RMS.
1) Frequency response is the same for both amps - 3 Hz to 30 Khz at -1 dB point.
2) S/N ratio non-wtd 20Hz - 20kHz B/W is 78 dB for "A" rev. and 80 dB for "B rev. S/N ratio A-wtd is 80 dB for "A" rev and 86 dB for "B" rev.
3) THD from 20 Hz to 20 kHz are <0.02% for "A" rev. and <0.004% for "B" rev.
4) Output impedance - Output 1 - 100 Ohm, Output 2 or 1+2 - 220 Ohm for "A" rev. Output 1 - 30 Ohm, Output 2 or 1+2 - 68 Ohm for "B" rev.
5) Maximum output @ 1 kHz for 1% THD (Output 1 into 100 Ohm) - 2V "A" rev, and 3V RMS for "B" rev.
We do not offer upgrades from "A" to "B" revision, as essentially it would mean replacing the unit, sorry
. However, soundwise, these two are somewhat different but I wouldn't say that "A" was worse and "B" is better. Main difference is maximum output into low impedance load - "B" rev can produce more current as it has lower output impedance and more current in the output stage transistors.
Regards
Alex
Creek Audio Limited