check www.madisound.com they have 16 ga air core inductors.
I'd probably go with the Jantzen 15 ga inductors if you really want to get everything from partsexpress.com
You probably won't be able to tell a real difference either way, but when in doubt I think it's best to go as closely as you can to Wayne's design.
I'd probably go with the Jantzen 15 ga inductors if you really want to get everything from partsexpress.com
You probably won't be able to tell a real difference either way, but when in doubt I think it's best to go as closely as you can to Wayne's design.
No one will hear any difference, if they dont know whats there, and if You tell them and they here it You probably have caught them lying.
The resistance rise going from 18 to 20 awg is in milliohm range, if You plan to use them as stage monitors at Hollywood bowl with
a 1kW pa amp at full throttle, this makes a difference but i think Your drivers would dislike that.
The bobbin is just more convenient to wind the cu wire on, nothing else. Go with the inductors easily obtained, and good luck,- the Lyra is reminiscent of the best AR and Roy Allison 70´s designs in sound- realy enjoyable.
Thanks! That's what I wanted to know.
I actually wound up ordering most of the inductors from Madisound. I used a steel core (Sledgehammer) instead of an iron core for the inductor in the woofer (guy at Madisound said there would be no difference) and I got some heavier inductors (Sidewinders) from him in place of a few others (only changed about 2 gauge).
I can't wait for this stuff to arrive so I can start building. Any tips on how to best parallel the caps? I could just tie together the leads, but I'm thinking I could use a terminal strip to connect them together. I think in one case, I will need to parallel four caps, so it may get messy if I don't have a plan.
Thanks again for all the great advice! I'll post some photos when the building is complete. Now its just waiting for the parts....
Kofi
I actually wound up ordering most of the inductors from Madisound. I used a steel core (Sledgehammer) instead of an iron core for the inductor in the woofer (guy at Madisound said there would be no difference) and I got some heavier inductors (Sidewinders) from him in place of a few others (only changed about 2 gauge).
I can't wait for this stuff to arrive so I can start building. Any tips on how to best parallel the caps? I could just tie together the leads, but I'm thinking I could use a terminal strip to connect them together. I think in one case, I will need to parallel four caps, so it may get messy if I don't have a plan.
Thanks again for all the great advice! I'll post some photos when the building is complete. Now its just waiting for the parts....
Kofi
Kofi Annan said:
dude we are not average "schmo"s here. Neither is Kofi Annan
The average schmo gets himself a bose or sony.
the non average schmo decides which car to buy based on how a properly installed stereo in it will should (never mind fuel mileage, cost of maintanance, and what JD power and Consumer Reports say).
In fact I have just rejected a car after the dealer told me I cannot change the car's stereo and that the factory supplied 6 CD changer/tape deck are "all you need". The factory supplied system did not even have pre outs!!!!!! most of us are NON average schmos!
as far as hearing things are concerned it pays to have family members who have slowly been trained to listen (instead of hear) and use them as judges.
my wife and sister can detect small changes in the speaker ccrossover. changes that LSP Cad claims are only 0.5db. and they dont know what changes to expect. their ears are my 1st judge.
Please send your wife and sister to the UN building this weekend. Chirac and I will be there putting together the Lyra crossover and we will need their expertise. Just tell the girl at the front desk that Kofi says they can come in.
While I have your attention (and since I've never ordered speakers before), I have some bonus round questions for you (plural):
Although I ordered some mounting screws, I'm assuming that the speakers will come with some kind of mounting kit and instructions. It can't be that hard as long as they tell you how big to cut the holes, but I thought I'd check anyway.
Also, speakers in the Lyra are supposed to be "flush mounted". I imagine that this means the speaker structure should be flush with the MDF and I'm hoping that the speaker documentation will come with information on how deep the recess should be for a flush mount. Can anyone confirm?
One last thing-- there is no mention of any required stuffing for the inside of the speaker box. Does anyone know if its best to stuff the box with foam / speaker stuff or should I leave it alone for best performance. I don't mind messing with it, but I just wanted some opinions.
Kofi
I do agree with Navin that we hear differences totally unmeasurable, was refering to the case with Kofi´s inductors which will be allright, and besides, who wants a finished project?
Isn´t that what this is all about, keep tweaking and improving?
How many of us has left the cabinet of a bought amp unopened for more than five minutes?
As for the family doubling as listening panel i also agree but i´m fortunate enough to have the absolute subjective reference living in this family:
The cat, Yes the same one that makes a mess in polyurethane compound and has managed to claw the needle off from one of the Ortofon SPU´s, she has a favourite spot in the middle seat in the music sofa. When i play music, anykind, she remains in place, purring, whatever level. On the rare occasions i play a CD she leaves, whatever music, whatever level.
Mounting screws: Use T-nuts and machine screws, at least for bass unit. Recession into baffle is not critical, You will gain more from attaching an absorbing "fence" of felt or such around the drivers.
Stuffing is important, a globaly available damping material would be Acousto Q, a good idea is to attach felt mat to all inner surface prior to stuffing, ( green felt mat sold cheaply at auto spare supliers) The Lyra should be quite heavily stuffed so start with filling the cabinet loosely and listen, if bottom end seems soft add and keep listening.
And Navin, i agree on the car issue too.
Isn´t that what this is all about, keep tweaking and improving?
How many of us has left the cabinet of a bought amp unopened for more than five minutes?
As for the family doubling as listening panel i also agree but i´m fortunate enough to have the absolute subjective reference living in this family:
The cat, Yes the same one that makes a mess in polyurethane compound and has managed to claw the needle off from one of the Ortofon SPU´s, she has a favourite spot in the middle seat in the music sofa. When i play music, anykind, she remains in place, purring, whatever level. On the rare occasions i play a CD she leaves, whatever music, whatever level.
Mounting screws: Use T-nuts and machine screws, at least for bass unit. Recession into baffle is not critical, You will gain more from attaching an absorbing "fence" of felt or such around the drivers.
Stuffing is important, a globaly available damping material would be Acousto Q, a good idea is to attach felt mat to all inner surface prior to stuffing, ( green felt mat sold cheaply at auto spare supliers) The Lyra should be quite heavily stuffed so start with filling the cabinet loosely and listen, if bottom end seems soft add and keep listening.
And Navin, i agree on the car issue too.
OK-- Mrs. Annan has indicated that we are short on cash, so I'm thinking I can get away wiith some Dacron (polyfill) stuffing from the crappy craft store that she hails. Will this do?
Also, I believe I need to stuff the sides of the enclosure rather than having the stuffing fly all over the place. Can you offer any stuffing tips?
Will this speaker gasket do?
Anyway, I intend to recess them since I think it will at least look better, but do you know if the recess measurements are included with the speakers, or will I have to measure? I suck at measuring.
Kofi
Also, I believe I need to stuff the sides of the enclosure rather than having the stuffing fly all over the place. Can you offer any stuffing tips?
Will this speaker gasket do?
Anyway, I intend to recess them since I think it will at least look better, but do you know if the recess measurements are included with the speakers, or will I have to measure? I suck at measuring.
Kofi
The polyfill will do allright, as the box should be pretty much filled ( lightly packed) with the damping material it will stay pretty much where it is, but do try the felt attached to inner surfaces.
The gasket is for making the mating surface of driver and box airtight. Recessing do look better, there will propably not be any advice or measurements supplied with drivers so look up the yardstick. You can still use the absorbing fence even though drivers are recessed with the same gain. The craft store is bound to have ample supply of suitable material.
The gasket is for making the mating surface of driver and box airtight. Recessing do look better, there will propably not be any advice or measurements supplied with drivers so look up the yardstick. You can still use the absorbing fence even though drivers are recessed with the same gain. The craft store is bound to have ample supply of suitable material.
Alright! Thanks for all the advice. My parts should arrive tomorrow and I suppose I'll start building the crossovers.... tomorrow.
Thanks again-- I'll post pictures either when they're finished or when I frog it up so bad and I freak so far out with anger that I need someone to look into the madness in my eyes and feel my murderous rage as I slowly descend into the Void of Anguish to be consumed by the All Cleansing Fire of Rage at which point I will be reborn into a metalloid inductor-charged speaker-like being who will wreak havoc on his tormentors, bringing unto them their ultimate death, resting only to conjure beings of similar ilk but with different wire gauges and DCR ratings who will wrest from the world any remaining traces of the Holy and the Just so that all of our kind may live in a world of Chaos and Ruin WITHOUT ANY SPEAKERS.
Thanks!
Kofi
Thanks again-- I'll post pictures either when they're finished or when I frog it up so bad and I freak so far out with anger that I need someone to look into the madness in my eyes and feel my murderous rage as I slowly descend into the Void of Anguish to be consumed by the All Cleansing Fire of Rage at which point I will be reborn into a metalloid inductor-charged speaker-like being who will wreak havoc on his tormentors, bringing unto them their ultimate death, resting only to conjure beings of similar ilk but with different wire gauges and DCR ratings who will wrest from the world any remaining traces of the Holy and the Just so that all of our kind may live in a world of Chaos and Ruin WITHOUT ANY SPEAKERS.
Thanks!
Kofi
Kofi Annan said:
My wife and sister are excited to hear about this. They packed their bags last night. Now all they need are the air tickets. You may email me offfline and I can give you my postal address so these can be fedexed asap. Since they are coming all the way from Bombay to NY they'd need 2 things that can help them get there quicker so they are ale to help u before your project is over. (1) a letter from you so that hey can get their visas and (2) living quarters close to the UN and transport to and from the UN.
You will need a router to flush mount the drivers if you are building the cabinet.
polyfil will do nicely. if you use foam use open cell foam.
as far as poly fil is concerned about 1 kg per cu.ft. is what i start with. I have got away with less. lay the poly fill on speaker walls and dont crown the rear of the woofer.
Sounds like a lot of trouble. I'll just use Michael Bloomberg's wife and sister. They're a lot closer and their ears are just fine. Besides, I think Bloomberg's sister is diggin' tha K-Dogg, if you know what I'm sayin'. Could be we relax later in the evening to a little smoove music on my new Lyrazzz...
Besides, I'm the Secretary General of the United Nations NOT the head of the US State Department-- I can't pull strings on the visas and I ain't got the coin to get folks from India to NYC-- I can't even afford real dampening material!
Thanks for the advice on the polyfill. Its about $2 US per bag at the craft store, so I'm glad to have an economical solution to the dampening issue.
Kofi
Project 90% complete-- I still have to put the gaskets and the final screws in the speakers, but its up and working and it sounds great.
I got a little sawdust in the silk dome for the tweeter and maybe its my imagination but I think that tweeter is buzzing a little. Is there any way to clean this or will I be buying a new tweeter?
Anyway, here's the proof that I DIYed this weekend:
I got a little sawdust in the silk dome for the tweeter and maybe its my imagination but I think that tweeter is buzzing a little. Is there any way to clean this or will I be buying a new tweeter?
Anyway, here's the proof that I DIYed this weekend:
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