What you should know about the Martin Logan i series. The i series is of course the later version of the Depth Sub, no i means its an oldie out of production. That is well known. What I found out though when I took this sub in to my dealer about a year ago after I bought it is that there were a couple versions of the i series too. Initially after the upgrade the subs had a version of both woofer and amp that has since been phased out even though labeled i. There isn't a way to tell cosmetically that I know of. The problem arises from the fact that if a driver has to be changed out to the newer version then the amp has to be changed as well. The worse news is that all three drivers should be changed at once. This won't arise often as the older parts were not used for that long after the change to the i series but you should be careful if you buy a used unit you think may need to be serviced.
My sub had a light hum when I bought it. I was told all the above at the dealer but then later informed by the service dept that the sub has the latest drivers, amps. Wiring was re routed around the power supply and the amp tests "well under factory specs" and is now dead quiet. Frequency sweep and other testing performed by Service as well for confirmation that it is within standards. I will supply the receipt with the info confirming current version of amp and performance with the sale.
Functionally perfect I rated appearance at a 7 just for age, no specific nicks or scratches stand out.
TERMS- In this case I will have to package the sub in aftermarket boxes and therefore fixed rate to ship insured US mainland is $90. The sub is priced very well for condition and I won't be lowering price for the first week or two. I will cover your pay pal fee if you use paypal.
20–120 Hz ±3dB; Anechoic through LFE effects input
Low Pass Filter Frequency
30, 35, 45, 55, 65, 80Hz
High Pass Filter Frequency
Bypass, 40Hz, 70Hz
Low Frequency Transducer
Three 8" (20.3cm) high excursion, aluminum cone with extended throw drive assembly, sealed non-resonant asymmetrical chamber format
350W (at less than 0.5% THD)
Line level RCA: 20,000 Ohms. Compatible with 4, 6, or 8 Ohm rated amplifiers.
±10dB at 25Hz
Left/Right RCA Line Level, RCA LFE, Speaker Level
Max: 300 Watts
Idle: 15 Watts
Standby: 10 Watts
70 lbs. (31.8 kg)
17.9" × 17.1" × 16.5"
(45.4cm × 43.5cm × 41.8cm)