kijanki
Responses from kijanki
| Confused by ICE applications According to one of the editorial reviews (can find it) Bel Canto's S300 suffers thin lower midrange but after placing it on anti-resonance cones sound becomes fuller. Rowland's case is milled from billet of aluminium. | |
| Burr Brown OPA 2143 vs NJM2068 Input offset current is 11nA typ and offset voltage 0.1mV. Total of 0.3mV giving generous 10k unbalance. Gain after DAC is practically none. Sub 1mV offset might be a problem for some power amps but not for mine (5Hz-65kHz). | |
| Single driver speakers - opinions Mariusz - he is my countryman as well but he operates in Massachusetts and it is not walking distance from where I am. I will take you on this offer - didn't you say 75% discount? | |
| Burr Brown OPA 2143 vs NJM2068 Typical bias current for LM4562 is 10nA. Taking into account possible unbalance of 10k we get 0.1mV unbalance. LM4562 has excellent AC characteristics but the sound is what matters. Benchmark uses it as a driver for XLR outputs because of the abil... | |
| DAC1 or DAC1 USB? Benchmark updated xlr output stage with stronger driver LM4562 (and changed/lowered values of divider network) on DAC1 USB. Non USB DAC1 has probably still older NE5532 but calling Benchmark is the best option. | |
| Single driver speakers - opinions Mariusz - I checked Lowther website and found that EX series speakers go as high as $2k a piece. Some of designs they show use 2 speakers per box = $8k in speakers alone (I like to have the best). One of the titles of their FAQ is "Why bass reflek... | |
| Confused by ICE applications Magfan - there is still some residue (about 1%) of 400 kHz but it is not harmful. Switching transients were already removed by output filter and 1% residue of 400kHz will radiate at 1/4 wave if speaker wires are longer than 615 feet. | |
| Burr Brown OPA 2143 vs NJM2068 I was refering to Joaco post about power amp that has TL081. As for 5532, it depends - if it's thin sounding Philips amp I would replace it, but if it is TI amp I would leave it. But if your amp has 5532 it probably has output capacitor (like Benc... | |
| Confused by ICE applications Magfan - about half of Icepower modules have built in SMPS including mentioned 200ASC used in Rowland's 102, Bel Canto S300 and PS Audio Trio.SMPS can put as much power thru 2" toroid at 100kHz as 10" dia, "big nice Toroid" at 60 Hz. In addition 1... | |
| Burr Brown OPA 2143 vs NJM2068 What's wrong with using the original part? - without going into technical stuff let just say that Texas Instr. introduced this part in October 1976 and LM4562 was introduced around 2006. Not only 30 years difference but also TL081 was design as un... | |
| Burr Brown OPA 2143 vs NJM2068 Joaco - TL081 is a single amp. It is very old and very cheap amp designed as a improvement over 741 type (one of the first op-amps). It is not an audio amp. LM4562 comes in single version with completely different number starting with LME.... - I ... | |
| Confused by ICE applications Magfan - why not to buy Icepower modules with power supply built in like 200ASC? Switching power supply, when done right, can be better than linear one (also smaller and cheaper) | |
| Single driver speakers - opinions Lowest string of the bass is E=44Hz. Grand piano's A=27Hz is seldom used. I will settle for 50Hz. On the high end - I probably cannot hear above 14kHz. Maybe I should go for single driver design.Only one question to all DIY guys - why Revel bought... | |
| Confused by ICE applications Magfan - IR published paper (google it) on class D with complete design (schematics, PCB etc). Your Maggies are power hungry and Icepower might be a good choice. | |
| Single driver speakers - opinions Mariusz - every design has some positives and negatives. Electrostatic panels are often problems in places with very high humidity and a lot of insects (high voltage attracts them). I don't mean to criticize electrostatic speakers - just to show t... |