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    Todd, If i remember correctly Earl mentioned...

    Todd,

    If i remember correctly Earl mentioned the pro version of the 175 is 2410. Looking at the data listings on-hand the 2410 has the exact same info i posted for the 175 group (DCR min/max,...
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    RE: My question is the DCR value on the 175DLH...

    RE: My question is the DCR value on the 175DLH divers are very different between the 2 speakers and there is an audible channel imbalance. One measures 6.3 ohms while the other measures close to 12...
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    What about connecting the woofers in series...

    What about connecting the woofers in series instead of paralell? Since this is a high efficiency cabinet it shouldn't require a lot of power to make noise, plus the cost of Watts is low. You need to...
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    @ macsic Very nice group of boxes you have...

    @ macsic

    Very nice group of boxes you have there!

    @ timelens

    One item i forgot to mention previously when you first asked questions, the one regarding the vents (bass reflex part of the...
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    416-8A goes back to 1972 according to the spec...

    416-8A goes back to 1972 according to the spec sheet date, so Macsic is probably right about the A being discontinued when the cabs were introduced.

    Richard
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    Timelens, I had a look at other older Altec...

    Timelens,

    I had a look at other older Altec documents i have and didn't see the info you're missing. I guess you will have to figure it out. You can do a LH forum search on the 817 to see if other...
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    This is the official Altec 817 plans. 91067 ...

    This is the official Altec 817 plans.

    91067

    Unfortunately the speaker mounting board info on the drawings has somewhat faded away, but the rest seems ok to read. Maybe the size of the speaker...
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    Welcome to LH. I have the plans and the two...

    Welcome to LH.

    I have the plans and the two versions of the 817 spec sheet. I don't have time right now, i will be back later tonight.

    Richard
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    The DI box test test setup, on top of the Aphex...

    The DI box test test setup, on top of the Aphex 120V power transformer. Either the interface's metal case shielding is very good or the DI balancing the line does the trick in killing hum/buzz, it...
  10. Nice cleaning job. RE Both measure the same...

    Nice cleaning job.

    RE Both measure the same resistance. Well 5.5. "Good" one measures 6.1.

    FYI, JBL factory DCR specs for LE 175: min 5.9 ohm, max 7.0 ohm (same numbers for the LE 175 DLH you...
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    Finally had a chance to test the Digiflex stereo...

    Finally had a chance to test the Digiflex stereo DI box with the portable digital recorder (Mini Disc) as source.

    Ref. Riley's post # 468 on page 32 here.

    RE the DI will give you about a -40...
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    RE I am surprised their sensitivity is so low...

    RE I am surprised their sensitivity is so low (92dB) despite using a compression driver.

    The lower sensitivity driver (usually woofer) often determines the system's sensitivity rating. Other more...
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    Had this already in the making. The JBL driver...

    Had this already in the making.

    The JBL driver listings i have don't give the specific part number for each component that goes into a driver (e.g. no coil or spider part number mentioned). The...
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    Hi Surfer, Welcome to the Lansing Heritage...

    Hi Surfer,

    Welcome to the Lansing Heritage Forum.

    Sorry, but i'm not convinced this would be a worthwhile undertaking. I think you will end up with an imbalanced woofer. Coil, spider and...
  15. Thread: Jbl glue

    by RMC
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    Very hard no, but hard enough yes.

    Very hard no, but hard enough yes.
  16. Thread: Jbl glue

    by RMC
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    David, In case you don't find the glue you're...

    David,

    In case you don't find the glue you're looking for you might want to look at silicone as fastener. Most people use silicone as a sealant but its also an good adhesive. With a small hand...
  17. Solen.ca sells crossover parts and also builds...

    Solen.ca sells crossover parts and also builds custom crossovers.

    There's also this here : Thread: JBL L250 crossover upgrade to 250Ti specifications

    Richard
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    In view of discussions elsewhere on this matter...

    In view of discussions elsewhere on this matter seems people may find this JBL document helpfull regarding CD/ Bi-Radial horns tilt filter.

    Please don't repost this on other web sites. Thank you....
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    As part of turntable stuff i posted last night i...

    As part of turntable stuff i posted last night i forgot to post the pic i had of the scale i mostly use to assess cartridge tracking force. I have three different ones, B&O and Shure, but my...
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    Hi Riley, Yup might dig in the trailer....

    Hi Riley,

    Yup might dig in the trailer. However, i'm already loaded with cables and connectors so i don't look for any now.

    Note the retail price of audio stuff in Canada is typically 40%...
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    The directional Monster Cables retired for now....

    The directional Monster Cables retired for now. If you increase pic size you can read some of the "jazz" printed on the jacket. The short Canare cables i made must be directional too since current...
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    Simulation of inserting vertically the twisted...

    Simulation of inserting vertically the twisted cable conductors in the hot solder pot.

    90953

    Non-aligned (lol) simulation of the Senior connector where wires can be soldered horizontally in the...
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    Due to interest regarding the spring RCA...

    Due to interest regarding the spring RCA connector presented in post # 489.

    Recall that i mentioned the connector is a little more tricky for cable assembly than the Senior brand RCAs for...
  24. RE NL.. Those look like Neutrik connectors? Are...

    RE NL.. Those look like Neutrik connectors? Are they one in the same?

    Let's not fool ourselves. During the 70's and 80's (possibly after too?) the 1/4" phone connector was widely used on MI and...
  25. I think with some analog graphic equalizer models...

    I think with some analog graphic equalizer models one may APPROXIMATE a similar boost/cut filter EQ.

    On the EQ shown the low cut filter is variable from 20hz to 200hz (also has high cut filter...
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