Vifa D26CN56-06 suitable replacement for Vifa D26CN55-06?

**1Michael** · 01 June 2020, 09:16 Monday

It would not be a suitable replacement unless the specifications were the same...

**Scareurpasenger** · 01 June 2020, 09:51 Monday

My understanding is there are some that are close enough, I just don't know what that is.

D26NC56-06.pdf
D26NC55-06.pdf

**JonMarsh** · 01 June 2020, 16:52 Monday

I dug up both data sheets, and they are pretty close in some key regards- impedance curve, and the general response from 3kHz and up. But the 56 has a somewhat more rising response above 7 kHz on axis, though the off axis behavior looks pretty similar at 30 degrees.

The only reasonably practical way to assess this would be to buy a pair from PE, get test data, and see what happens when I drop them into the original NeoD crossover circuit, either in LspCAD or in VituixCAD, and re-enter the design into that.

The original set were given to one of my daughter's cousins, a guy who is a partial paraplegic due to a diving accident, so I don't have the speakers around.

Funny, I could even update the design (possibly) with the Dayton Esoteric 7" woofer or the Dynavox, for those wishing to save money, and have a more modern lower distortion motor in either case. Those drivers should be in storage locally... now the only trick would be finding some time.

Home

https://www.parts-express.com/dayton-audio-es180tia-8-7-esoteric-series-woofer-8-ohm--295-398

Dayton Audio ES180TiA-8 7" Esoteric Series Woofer 8 OhmDayton Audio's Esoteric Series is the ultimate expression of Dayton Audio’s transducer engineering knowledge and finesse. Featuring high-end materials and advanced engineering throughout, the Esoteric Series collection of drivers elevates the state of the art in driver design. Now with a flatter frequency response and smoother high frequency roll-off allowing for extended bandwidth and easier crossover integration.The ES180TiA-8 7” woofer is a technological tour de force, with a fully FEA- and Klippel-optimized design from the powerful neodymium motor assembly with dual shorting rings to the moving structure with large 3” voice coil, titanium voice coil former, and tightly woven glass fiber cone. The voice coil is edgewound using rectangular copper-coated aluminum wire (CCAW) for maximum conductor density within the magnetic gap. The motor structure has been optimized using magnetic finite element analysis (FEA) to provide a symmetrical and extended flux field along the length of the gap, to permit longer excursion beyond the traditional limits in loudspeaker motor design. Dual shorting rings reduce coil inductance by shorting eddy currents created by the coil when it moves, for greatly reduced distortion. A titanium voice coil former was chosen to transmit motor force with maximum efficiency and minimal deformation of the coil former, for supreme resolution. The woven glass fiber cone supports the high force generated by the motor assembly with less deflection than other cone materials. Even the suspension system has been Klippel-optimized for excellent linearity. The attention to detail doesn’t end there – even the voice coil leads are tethered to the black Conex spider to eliminate mechanical resonance.All of these elements combine to create a driver that breaks new ground with superb transient response and ultra-low distortion. By breaking free from established design conventions and rethinking how each part of the driver should behave, the ES180TiA-8 consistently delivers a musically accomplished performance, time after time. It works well as the woofer in a 2-way high-performance loudspeaker system, and the 8-ohm impedance makes it a natural choice for dual woofer configurations.

Home

https://www.parts-express.com/dynavox-lw6004pmr-nc-6-1-2-truncated-frame-woofer--295-622

Dynavox LW6004PMR-NC 6-1/2" Truncated Frame WooferWith an amazing combination of value and technology, the LW6004PMR-NC is an obvious choice for use in high performance designs that won't break the bank. With smooth response from 50 to 5,000 Hz this woofer is a great choice for use in 2-way systems, allowing easy transition to most tweeters. In addition, the truncated frame design allows for much closer center-to-center spacing between drivers.Dynavox has packed a surprising amount of technology into the LW6004PMR-NC. To begin with, this driver uses a huge 3" voice coil on a vented aluminum former. The one-piece polypropylene mica composite cone/dustcap is extremely light with great damping characteristics to produce natural response. The motor on this driver uses a triple magnet design in which the magnets are set inside the massive voice coil to maximize the magnetic force on the gap. In addition, the cast aluminum frame allows ample room for the rear of the driver to breathe along with extensive voice coil and motor venting.

Let's get some of those tweeters on hand, and see how they work first...

**nerdofnerds** · 01 June 2020, 18:53 Monday

Originally posted by JonMarsh

I dug up both data sheets, and they are pretty close in some key regards- impedance curve, and the general response from 3kHz and up. But the 56 has a somewhat more rising response above 7 kHz on axis, though the off axis behavior looks pretty similar at 30 degrees.

The only reasonably practical way to assess this would be to buy a pair from PE, get test data, and see what happens when I drop them into the original NeoD crossover circuit, either in LspCAD or in VituixCAD, and re-enter the design into that.

The original set were given to one of my daughter's cousins, a guy who is a partial paraplegic due to a diving accident, so I don't have the speakers around.

Funny, I could even update the design (possibly) with the Dayton Esoteric 7" woofer or the Dynavox, for those wishing to save money, and have a more modern lower distortion motor in either case. Those drivers should be in storage locally... now the only trick would be finding some time.

Home

https://www.parts-express.com/dayton-audio-es180tia-8-7-esoteric-series-woofer-8-ohm--295-398

Dayton Audio ES180TiA-8 7" Esoteric Series Woofer 8 OhmDayton Audio's Esoteric Series is the ultimate expression of Dayton Audio’s transducer engineering knowledge and finesse. Featuring high-end materials and advanced engineering throughout, the Esoteric Series collection of drivers elevates the state of the art in driver design. Now with a flatter frequency response and smoother high frequency roll-off allowing for extended bandwidth and easier crossover integration.The ES180TiA-8 7” woofer is a technological tour de force, with a fully FEA- and Klippel-optimized design from the powerful neodymium motor assembly with dual shorting rings to the moving structure with large 3” voice coil, titanium voice coil former, and tightly woven glass fiber cone. The voice coil is edgewound using rectangular copper-coated aluminum wire (CCAW) for maximum conductor density within the magnetic gap. The motor structure has been optimized using magnetic finite element analysis (FEA) to provide a symmetrical and extended flux field along the length of the gap, to permit longer excursion beyond the traditional limits in loudspeaker motor design. Dual shorting rings reduce coil inductance by shorting eddy currents created by the coil when it moves, for greatly reduced distortion. A titanium voice coil former was chosen to transmit motor force with maximum efficiency and minimal deformation of the coil former, for supreme resolution. The woven glass fiber cone supports the high force generated by the motor assembly with less deflection than other cone materials. Even the suspension system has been Klippel-optimized for excellent linearity. The attention to detail doesn’t end there – even the voice coil leads are tethered to the black Conex spider to eliminate mechanical resonance.All of these elements combine to create a driver that breaks new ground with superb transient response and ultra-low distortion. By breaking free from established design conventions and rethinking how each part of the driver should behave, the ES180TiA-8 consistently delivers a musically accomplished performance, time after time. It works well as the woofer in a 2-way high-performance loudspeaker system, and the 8-ohm impedance makes it a natural choice for dual woofer configurations.

Home

https://www.parts-express.com/dynavox-lw6004pmr-nc-6-1-2-truncated-frame-woofer--295-622

Dynavox LW6004PMR-NC 6-1/2" Truncated Frame WooferWith an amazing combination of value and technology, the LW6004PMR-NC is an obvious choice for use in high performance designs that won't break the bank. With smooth response from 50 to 5,000 Hz this woofer is a great choice for use in 2-way systems, allowing easy transition to most tweeters. In addition, the truncated frame design allows for much closer center-to-center spacing between drivers.Dynavox has packed a surprising amount of technology into the LW6004PMR-NC. To begin with, this driver uses a huge 3" voice coil on a vented aluminum former. The one-piece polypropylene mica composite cone/dustcap is extremely light with great damping characteristics to produce natural response. The motor on this driver uses a triple magnet design in which the magnets are set inside the massive voice coil to maximize the magnetic force on the gap. In addition, the cast aluminum frame allows ample room for the rear of the driver to breathe along with extensive voice coil and motor venting.

Let's get some of those tweeters on hand, and see how they work first...

Not to veer off topic, but do you have measurements available for the Dynavox woofers? I have been curious about these as Newark discounts them frequently.

**Concillian** · 02 June 2020, 00:01 Tuesday

FYI, I have basically all components to a L/R set of NeoD CC that I bought a LONG time ago and have basically found myself "too busy" to finish the cabinets for a decade or so. I may have cannibalized some of the XO components here and there, but I definitely have all the original drivers for the design. At this point if I ever build something it will have to be very different due to WAF changes. If you need the tweeters, or any / all components to it, let me know or they'll just end up rotting in my garage.

**JonMarsh** · 02 June 2020, 11:28 Tuesday

Originally posted by nerdofnerds

Not to veer off topic, but do you have measurements available for the Dynavox woofers? I have been curious about these as Newark discounts them frequently.

That's on my list of things to do that have't gotten done, yet... that list is a long as my arm, and my free time has been about the length of my palm...

It's painful because in a lot of cases I've gotten as far along as building test enclosures but not yet mounting drivers- right now the big push is in the Duelund configuration crossover setup for the Ardent D, with the RS52 and DA25, and some derivative speakers using different woofers, including for possible CC configurations with either 6" or 7" Anarchy woofers (all on hand...)

It's easy to order stuff, takes more work to build and test things!

Vifa D26CN56-06 suitable replacement for Vifa D26CN55-06?

Vifa D26CN56-06 suitable replacement for Vifa D26CN55-06?

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