rjrbass
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Posts posted by rjrbass
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My amplifier, Marantz PM7200, does not have preamp outputs, or a subwoofer output. It does have Signal Processor/Equalizer inputs and outputs. I have the option to connect my active subwoofer with line in/out or speakers in/out. I have it connected to the Signal Processor/Equalizer inputs and outputs. Is this preferred over using the speaker inputs/outputs?
Thanks - Richard
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Cask05, thanks again, now I have an understanding of what I am doing, and how the phase affects the sound. Basic physics, simple harmonic motion, waves, nodes, crests etc. and timing the waves with the phase control.
- Richard
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Thanks Cask05. My subwoofer does have a phase control, however I am unsure how to set it up. The manual states to set it for the most bass, which happens to be at 180 degrees. Is there a better method to set it up? My only choices are 0, 90, 180 and 270 degrees. If you have the time, I would really appreciate an understanding of what it does.
Thanks - Richard
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Chris, thank you for your informative reply. I will set the parameters as you indicated. I had never considered the built in delay, and moving the sub may not be an option due to the room. I don't think that I will use a sub on the Cornwall system. I appreciate the Cornwall as it is.
Thanks again - Richard
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I have just purchased my first subwoofer, and I love it. I love it so much that I will purchase one for each system, while they are still on sale.
My musical taste is classical, musicals and vocals.
Where should I set the low pass filter for use with my Klipschorns?
Now where should I set it for my LaScalas?
Finally, same question with my Cornwalls?
Thanks,
Richard
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djk, thanks for the advice. You are correct that the mids and HF speakers are in series/parallel to net 8 ohms. I will recap with good quality caps and I will take your advice on a smaller cap value for the HF.
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I purchased a pair of Sentry 100 speakers but cannot find out any info on these. The cabinets are 36" h X 31" w X 22" d, and contain 9 drivers, 15" woofer, 4 - 4.5" midrange and 4 - 2" tweeters. All drivers are 8 ohm. The current Xover consists of only an 8 uf cap to the tweeters and 24 uf cap to the midrange. The wiring to the woofer, mid and tweeters is in parallel, and the 4 tweeters are in some sort of series arrangement, as are the mid. I have no idea of the Xover points. I have a spare pair of B3 (Cornwall) Xovers. Can I use the B3 for these speakers?
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Congratulations on the great finds. I avoid garage sales for fear that I will come home with more bargains than I have room for.
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Groomlakearea...Thank you for your comments. Since the speakers have not been oiled in a few months, I will start with the glass directly on the wood.
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I need suggestions. I am placing glass over the tops of my oiled walnut Cornwalls to protect them. Do I place the glass directly on the wood or use felt pads or silicon pads?
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The turntable just says Revolver LL58371 on the label and has the split base. It is not the Rebel. My friend recently replaced both the belt and the cartridge. I thought that $15 for my Thorens TD 160 was a good deal, but I think that the Revolver for $50 was an even better deal. What do you think is a better table the Revolver or the Thorens?
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Thanks, as a matter of fact, I will only have one neighbour. His house is > 40' away. My sound rooms are on the other side of my new house, facing my woods.
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This week I move to a house from an apartment. I will finally have the space that my Khorns, LaScalas and Cornwalls need. To make it even better, a friend wanted to give me a Revolver TT fitted with a Linn Basik LV X arm and a Goldring Elektra cartridge. I couldn't accept such a gift so we agreed on $50. This will replace my Thorens TD 160 with the Khorn system, and the Thorens will now move to my LaScala system. Great week!
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Belle Klipsch used the AB crossover from Feb. 1983 to Oct. 1983. In October 1983 the K-55-M was introduced, along with the AB-2 crossover. In May 2001 the K-55-X was introduced with the AB-3 crossover. This dates your Belles between Oct. 1983 and May 2001, since the midrange is the K-55-M. I would continue looking for the S/N to be stamped in the edge of the wood on the back of the cabinets. Often you will also see USA. The S/N will reveal the year and sometimes the date of manufacture.
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Bring ca$h to the store. You can negotiate much better with ca$h. When I bought my La Scalas the price was $699 plus tax. I payed $570 plus tax ca$h because ca$h talks volumes.
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Thank you, so very much, for your valuable insight. I know nothing of tube testers, and was tempted to purchase this unit; not now. I will take your advice, and test tubes by trying them in working amplifiers.
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Experts, I need your advice. I found a tube tester on Kijiji but I know nothing about tube testers, other than how to use them. I have communicated with the owner, and he is willing to lower the price for me. My question, is this a good deal for $75? It is only about a 25 minute drive away.
http://hamilton.kijiji.ca/c-buy-and-sell-electronics-Vintage-Stark-Tube-Tester-W0QQAdIdZ214337175
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Don't get rid of any...you will regret it. Live with them for a few months and they will disappear into the walls, or at least not be so noticable to you. I have Cornwalls in my small living room, then added LaScalas to my smaller dining room, then added Khorns to the living room, then large vintage Corals in my tiny bedroom. I adjusted one pair at a time, and now I could not part any. Soon I will be moving into a house with large rooms and an audio/video room. I will have room for everything and more.
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Thanks to all who offered advice. I do hope that the speaker response will improve with time and use.
The big difference is the impedance, the new woofers are 3.7 ohms. The old woofer with the rubbing voice coil is 2.7 ohms. I believe that this would allow more current (power) to pass through the woofer, hence sound louder.
I have triple checked everything and replaced the seals. The bass door panels are sealed tightly, the motor board is sealed well, and all panels are tightly secured. Phasing is correct and also verified with a phase test track on a testing CD.
The Khorn is tightly sealed against the walls with pipe insulation. Still the bass is not as loud, I will continue to use and pray that time will heal all.
Thanks again,
Richard
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The replacement woofers are new, very few hours if any. I wondered about a break in time for woofers, but could not find anything of value on Google.
Thanks, I have seen good write ups on the old alnico K-33-J woofers, and now I believe it to be true. The Jensen P15LL woofers are great. I may get the damaged unit repaired, but I fear that it will never be the same.
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How can I improve my bass response in my 1964 Khorns? I recently replaced my K-33-J (Jensen P15LL) woofers, due to a rubbing voice coil, with new K-33s. The K-33-J has amazing bass response, but the new K-33s are lacking in volume level, depth and low frequency reproduction. I thought that maybe the problem was that the bass bins were not tight as some of the gasket was slightly damaged when removing the dog house door. All gaskets were then replaced, and the results are the same. Any suggestions or comments will be appreciated. Thanks,
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Thanks for your quick reply "HarryO". Yes they are labeled P15LL on the frame. Would you happen to know a good recone shop in the Toronto, Canada area?
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My Khorns are about 1965, therefore about 45 years old. Woofers are labeled Klipsch K33J, therefore I believe these to be manufactured by Jensen. The voice coil is rubbing on one woofer. Is there a value to have this repaired? Do these old alnico woofers have any special value due to their age? Thanks,
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I know that sand was used to reduce cabinet resonances, but this was in the cabinet, not in the stand. When I used speaker stands, I used a model that was hollow, and coated with high density rubber foam to reduce stand resonances. I don't know about increasing bass response.
From Wikipedia.."In the 1950s and 1960s, Wharfedale became famous for its technique of eliminating cabinet resonances by using a double cabinet, with the space between the inner and outer shells filled with sand. Purchasers of the loudspeaker systems would receive the appropriate quantity of sand which had been shipped from Wharfedale in England."
What is the better way to connect a subwoofer to my amplifier?
in Technical/Restorations
Posted
Thanks to everyone for the great advice. I will be making the changes this weekend, going with the speaker inputs. The sub does have a high pass crossover that I can set to either 80 or 100 Hz. Since my speakers are LaScala, I will use the 80 Hz. Wish that it had a lower setting, as I love the bass from the LaScala, just not sufficiently deep.
Thanks all - Richard