The dimensions are 2.126 x 0.905 x 3.150"/54 x 23 x 80mm (W x H x D), excluding knob and rubber feet -- it's just like a bunch of credit cards stacked to 0.905" (23mm) high. The knob adds approximately 0.625" (15.88mm) to the depth.
When the wallwart/charger is plugged in, the amp will basically run off wallwart power, but it will also be charging the battery which isn't good for the long term if it's already fully charged. Never remove the battery while plugged in.
The high-performance edition lasts about 12-15 hours while the extended runtime edition lasts about 22-25 hours. Other factors such as the source output level, the amp output level (how loud you play), efficiency of your headphones, program material, battery capacity, your playing habit, etc. all have impact on the actual running time.
We use ultra high capacity 9V NiMH rechargeable battery which can be recharged up to 500-1000 times.
A brand new battery may require several full charge/discharge cycles to reach its optimum capacity.
It takes approximately 16 hours.
Given the fact that the Mini³ runs off a 9V battery, it will probably drive it satisfactorily to moderate listening levels, but don't expect ear-splitting levels of 100dB+. A desktop amp such as the β22 could really drive such high impedance phones with headroom to spare.
It depends on the efficiency of your headphones, the output level of your source component (see next question ), and your listening habit (do you like it REALLY loud?). Normally, a gain of 5 is a good all-round number and will work comfortably with headphone impedance ranging from 32 to 300 Ohm. If your headphones are efficient (32-120 Ohm) and sensitive (98dB/mW+), a gain of 2 would work as well. Please specify your desired gain setting when placing your order.
The specs sheet should tell you. But typically, a full-sized CD player outputs 2V+ rms, while iPod outputs <1V rms into 1KHz.
It's a matter of personal preference. The high-performance edition is a bit more snappy and dynamic, while the extended runtime edition is a little mellower. The difference is very subtle, though. Low impedance headphones will be able to take advantage of the high-performance edition's higher output current capability.
Yes, but to keep the costs reasonable, certain limits apply:
This is a tough question: it really depends on its application and your preference. For more informed answers, please check out head-fi.org, headwize.com, and Tangent's Notes on Audio Op-Amps.
We standardize on the high-performance σ11 ("sigma 11"), utilizing oversized toroidal transformer. However, for those on a tight budget, a wall-wart can be utilized.
YBM Audio currently offers the cost-effective 3-channel "active ground" version as well as the high-performance 4-channel balanced version.
Sorry, with the possible exception of the M³ (bass boost) , none of our products offer tone control.
The actual appearance of your amplifier depends on your desired configuration and selection of parts (including the chassis, of course). Pictures shown on the Gallery section are some of our previous works and may or may not necessary reflect your actual amp.
Farnell 1217090 (for 230VAC 50Hz Euro), or Farnell 1217086 (for 230VAC 50Hz UK).
Sorry, we don't.
We don't offer kits. Only completely finished products.
Sorry, we don't offer such service.
Only if you don't plan to use the battery ever. Not all 9V batteries are made equal, there are slight variations in actual dimensions thus the battery clips must be customized to fit certain brands/models of batteries to accommodate the compact enclosure.