The designers of the Philips AG9015 were aware which type of resistors where to use. Unfortunatley at repairs the carbons typically are never replaced with carbons…

Recommend for replacement: Takman, Kiwame or Riken ohm for carbon. I actually test/use Xicon, for now they are OK. Alen Bradley tend to degragade over the years, so not recommendable. (even if soldering with caution)

List what and where to use:

Carbon composite

If you see “brown” resistors, these are the carbon composite resistors. All in the audio path should be such! The disadvantage of the component is the high tolerance and the original ones really tend to fail. Example: I had to replace R30 and R130 in nearly all amp I saw and many other carbon resistor were source of mysterious noise… . I used 1/2W Xicon resistors. In the original schematic these are the carbon composites: R154,R5, R6, R7, R105,R106, R107, R53,R153, R49,R149, R22, R122, R23, R123, R14, R15, R114, R115, R18, R19, R20, R21 , R118, R119, R120, R121, R29, R129, R24, R26, R30, R124, R126, R130, R34, R134, R31, R32, R131, R132, R44, R16, R116, R42, R142.

1/2W is fine for these. Carbon composite rare to find in bigger heat dissipation.

Carbon film:

You will not find such in the AG9015. I personally find these less good then the carbon composite.

Metal film:

You will find a lot of such in the Ag9015 power circuit. and also in the audio circuits.

R2(2W),R3,R4(2W),R13, R55, R155, R8, R108, R43, R143, R45, R145, R9, R109, R17, R117, R10,R11,R12, R110,R111,R112, R27, R28, R127, R128, R25,R36(2W), R125, R136(2W),R33, R35, R133, R135, R37(2W), R137(2W), R38 (5W) , R138 (5W)

Where not marked, the resistor has 1W dissipation capability. They look much bigger as resistors from nowadays, so you may buy 2W to keep the look.

Metal oxide composite:

Good for power supply applications, but you will not find such in the AG9015

Metal wire:

These are one of the best for power supply applications. R1 (4W) is such.