almarg
Responses from almarg
| Magnavox or RCA tube amp My instinct would be to go with the RCA. Back in the day they made some nice little 10 watt or so amps using push-pull 6V6 tubes in their output stage. Around 1990 I acquired a vintage RCA mono integrated amp that was either the following model ... | |
| DC Offset Blocker/Killer - where to buy in the USA That all seems perfectly consistent with the explanation I proposed in my previous post, Jim. The hairdryer draws considerably different amounts of current in the positive half-cycle than in the negative half-cycle. The resulting DC offset corresp... | |
| DC Offset Blocker/Killer - where to buy in the USA If Al is still following this thread I am sure he will have a better technical answer. Not necessarily, Jim :-)Your finding that having the hairdryer plugged into the outlet where the measurement was taken resulted in a DC offset of around 730 mv,... | |
| Which area of components to spend the most $ on? Boy I was wrong all my life! While there are exceptions of course, for a given level of quality there will tend to be at least a loose correlation between the cost of a speaker on the one hand, and the deep bass extension and the maximum volume it can provide with reasonably... | |
| Different types of cable for bi-wire There might be an issue, depending on the impedance characteristics of your speakers and on the length of the cable. For example, the combined resistance of the two conductors of a 10 foot 26 gauge silver cable is around 3/4 of an ohm. That is abo... | |
| Is DEQX a game changer? Hi Steve,For the speaker calibration measurements what I initially tried was placing large sound-absorbent panels behind and to the sides of the measurement mic, with each speaker having been moved to the center of the room for purposes of that me... | |
| Help! Power question As Cleeds alluded to, it may be helpful to indicate which specific Furman model you are using.And if it is one of their models which provides "current reserve" at some of its outlets, that are intended for connection to amplifiers and subwoofers, ... | |
| Will a MC phono preamp overload and distort with a higher output MC cartridge? The phono stage is spec’d as having a gain of 650 (which btw corresponds to a gain of 56.26 db), and as having a maximum output capability of 3.2 volts.3.2 volts/650 = 4.9 mv.So an output from the cartridge of 4.9 mv or more would overload the pho... | |
| DC Offset Blocker/Killer - where to buy in the USA P.S. to my previous post: I didn’t mention the units that should be used for R and C in the various calculations. If R is expressed in ohms and C is expressed in Farads, the calculation described in my last paragraph will provide an answer express... | |
| DC Offset Blocker/Killer - where to buy in the USA Hi Jim,They both appear to be reasonable values for this purpose. The 10 uF/100K combination will charge up to the final value about twice as fast as the 22 uF/100K combination, which isn't important, but it won't be down quite as far at 60 Hz as... | |
| DC Offset Blocker/Killer - where to buy in the USA Jim (Jea48), good posts as always. My only comment on your low pass filter project is that with the 22 uf and 100K values it will take around 10 or 15 seconds after the AC is applied for the cap to fully charge up to whatever amount of DC may be p... | |
| What is the best pre-amp for ARC Ref 75SE amp? As a point of information, the Ref 75se (as well as other ARC Ref amps which only provide XLR inputs) will not work properly unless it and they are provided with balanced pairs of input signals. If the amp is provided with single-ended inputs, eit... | |
| 10 db or 20 db attenuator? The Harrison Labs attenuators use resistor values that are far lower than the values used in the Rothwells, and consequently they will present too heavy a load to be optimal for many components which may be used to drive them. Especially many tube... | |
| Increase total Speaker Impedance -- Potential Solution @dentdog, that sounds like a very nice pairing to me. It appears that the amp would be driving a pair of "full range" drivers in your Zu Def IVs that are specified to cover 30 Hz to 12 kHz, plus a tweeter. While the speaker also incorporates a pow... | |
| Increase total Speaker Impedance -- Potential Solution Thanks Bob (Gdnrbob). To add to the previous comments, an autoformer such as the Zero inserted between an amp and a speaker will provide very different (and most likely much better) results than if a speaker driver or a speaker is inserted in ser... |