Passive filters

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updated: Sept-12-2021

Each filter is purpose made for a specific headphone (see list below) and can NOT be used for other headphones. There thus is no ‘universal’ filter.

Passive filters can ONLY attenuate. (Substantial) peaks in frequency response are far more sound degrading than dips. This is what these filters do they remove emphasis and bring it down to the proper level.

The picture below shows some examples of what built filters can look like.filter samples

The filters are custom built so it may take a few days before I have time to make you one. It could take up to a week before it can be shipped. Parts may not always be on stock which can increase the waiting period before it is delivered.
There is no obligation to buy when contacting me.

Since I buy parts in small quantities from E.U. sellers and everything is hand-built by me I cannot offer these filters for Chinese-made prices alas nor offer Chinese shipping costs.

Depending on the used connectors and shipping method and destination expect the total price of a filter (incl. shipping) to be somewhere between €35.- and  €60.-

Conditions:

Cables and available in red, blue or black. No other cable brands types than the ones that are in stock are available, also not on request.
Various lengths can be ordered, the minimum length is 25cm to 30cm depending on the used connectors.
Maximum length (for high impedance headphones) = 4m.

There are only a few type of 3.5mm and 6.3mm and 4-pin XLR connectors available and a 3-pin mini XLR (AKG, Beyerdynamic) which are listed below. No other brands or types of connectors will be used. 2.5mm TRRS balanced cable is also possible.

Everything is handmade so can have some cosmetic impurities/flaws here and there.
This is not a factory made product with subsequent pricing.

A filter itself costs between € 22.- and € 35.- depending on the used connectors. (note: shipping costs are NOT included in this price and need to be added).
There are a few shipping options available. Prices for shipping need to be added and range from € 8.20 to € 25.- depending on weight, tracking, registered or not and destination and shipper.

Payment is due when the filter is commissioned. Within EU IBAN bank transfer is possible as well as PayPal.
Because of PayPal fees the price will be about 4% higher when paid with PayPal.
Outside the EU payments using PayPal is the only option (payment in Euros).

There is no receipt with VAT nor other material specifications. Building these filters is a labour of love (costs a lot of time to make it).
Some parts may not be on stock which can increase the waiting time before it is finished.

Alas, shipping outside is only possible signed for and insured. On specific request filters can be sent not signed for and not insured to some countries.
DHL
Parcel shipping is only possible for some EU countries. Outside E.U. only DHL Express.

how does this work ?

This is not a webshop so when interested in a (listed) filter you need to contact me (solderdude) via e-mail.

What I need to know are the following things:

The filter you need. (choose from the list of available filters below)filter options


The
filter parts incl. assembly but excluding connectors and shipping is € 17.50
note:
when you want a specific or custom filter made for a not listed headphone simply contact me.

Which (male) plug you want (the plug that goes into the amplifier/player/phone).
You can choose from this list of available connectors
only.
When in stock I can also make filters using
2.5mm TRRS for balanced connections (not shown below).
connectors pricing plugs
The cable length you want (min. 25cm) in meters (€ 2.- / meter) and cable color (red, blue or black for TRS, black only for XLR-4pin and 2.5mm balanced)

The (female) socket you want (where your headphone plug goes into)
You can choose from this list of available connectors
only.connectors pricing sockets

Note: I do not have any goldplated 6.3mm TRS sockets.
When in stock I can also make filters using 2.5mm TRRS for balanced connections.

The preferred shipping method (your choice, discuss this in e-mail):

Signed for and insured (price depends on weight)
Contact me for shipping quotation as it varies from country to country, shipper and type of shipment. Shipping costs vary between €8 and €30 as a rule.

For Germany and some some other E.U. countries DHL Parcel is possible. Costs will be between € 12.- and € 16.- depending on destination. Do note that DHL parcel shipping is NOT INSURED.
DHL Express delivery is also possible but is quite costly.

Your name, address, phone number (for DHL Express), e-mail etc.

The preferred payment method.
IBAN (within E.U.), when using PayPal (add 3.5% + €1.00)

Again, as this is not a webshop there is no ‘buy now’ or ‘order’ button.
You need to contact me via e-mail and simply tell me what you are looking for or want to know.

Depending on the used connectors and shipping method and destination expect the total price of a filter (incl. shipping) to be somewhere between €32.- and  €50.-


A few schematics for DIY’ers

The schematics below are from just a few filters. When you want the schematics for any of the filters listed above please contact me


Below the filter schematic for the HIFIMAN Edition Xv2, Edition XX, HE-400S and Ananda
Ananda filter schematic


Below the filter schematic for the HIFIMAN HE400i

HE400i (HE4XX) filter schematic


Below the filter schematic for the HIFIMAN Sundara

Sundara filter schematic


Below the filter schematic for  the HIFIMAN Arya
Arya filter schematic


Below the filter for the NAD VISO HP50
filter schematic


Below the filter for 1More Triple Driver Over Ear Headphones.
1MTDOE filter schematic


Below the filter for Beyerdynamic DT1990 , DT1770 (when fitted with DT 770 pads)  and Amiron Home
DT1990 filter schematic-C


Below the filter for the Master & Dynamic MH40
filter


Takstar Pro82 (earlier version)
Pro82 old filter


Below the filter for the Sennheiser HD58X and HD660S

FILTER HD58X


Below the filter for the Sennheiser HD800
HD800 filter schematic


Below the filter for the Sennheiser HD800S
HD800S filter schematic


Below the filter for the Beyerdynamic DT880 Black Special Edition
DT880 Black filter schematic


Below the filter for the Beyerdynamic DT880 600Ω
DT880-600 filter schematic


Below the filter for the AKG K712 / K7XX
K712-K7XX filter schematic


Below the filter for the AKG K812
K812 filter schematic


Below the filter for the AKG K612, K701, K702
K701-K702-K612 filter schematic


Below the filter for Grado SR60/80/125
Grado filter schematic


Below the filter for the AKG K371
K371 filter schematic


Below the filter for the Audio Technika ATH-MSR7
MSR7 filter schematic


Below the filter for the Shure SRH840
SRH-840 filter schematic


Below the filter for the Shure SRH1840
SRH-1840 schematic


Below the filter for the Sennheiser HD560S
HD560S-filter-schematic-C


Below the filter for the Focal Utopia
Utopia filter schematic


Below the filter for the Yamaha MTH220
MT220 filter schematic


Below the filter for the Audeze Sine with Vesper Audio over ear pads
Audeze Sine filter schematic


Below the filter for the Audeze LCD2 Closed Back.
LCD2 closed filter schematic


Below the filter for the Audio Technica ATH-SR9
ATH-SR9 filter schematic


HIFIMAN HE560(v2) filter
HE560v2 filter schematic


Beyerdynamic DT990-250 filter
DT990-250 filter schematic


Superlux HD330 filter
HD330 filter schematic


Superlux HD660 Pro filter

The shown schematic values are only suitable for the 32Ω version,
The schematic is the same for the150Ω version but the inductor = 4.7mH, the capacitor = 68nF and the resistor must be 680Ω .
HD660Pro filter schematic


Sennheiser HD560 Ovation II and HD540reference II (Gold)

HD540-560 filter schematic


post separation

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Comments
  1. Markus Ikonen says:

    Hi
    I would be interesred in a filter for the dt 1990 pro
    3.5mm rean black gold jack and socket short version 20cm cable color does not matter.

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